hw/usb/dev-hub.c

   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
  36 #define MAX_PORTS 8
  37
  38 typedef struct USBHubPort {
  39     USBPort port;
  40     uint16_t wPortStatus;
  41     uint16_t wPortChange;
  42 } USBHubPort;
  43
  44 typedef struct USBHubState {
  45     USBDevice dev;
  46     USBEndpoint *intr;
  47     uint32_t num_ports;
  48     bool port_power;
  49     QEMUTimer *port_timer;
  50     USBHubPort ports[MAX_PORTS];
  51 } USBHubState;
  52
  53 #define TYPE_USB_HUB "usb-hub"
  54 #define USB_HUB(obj) OBJECT_CHECK(USBHubState, (obj), TYPE_USB_HUB)
  55
  56 #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
  57 #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
  58 #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
  59 #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
  60 #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
  61 #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
  62 #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
  63
  64 #define PORT_STAT_CONNECTION    0x0001
  65 #define PORT_STAT_ENABLE        0x0002
  66 #define PORT_STAT_SUSPEND       0x0004
  67 #define PORT_STAT_OVERCURRENT   0x0008
  68 #define PORT_STAT_RESET         0x0010
  69 #define PORT_STAT_POWER         0x0100
  70 #define PORT_STAT_LOW_SPEED     0x0200
  71 #define PORT_STAT_HIGH_SPEED    0x0400
  72 #define PORT_STAT_TEST          0x0800
  73 #define PORT_STAT_INDICATOR     0x1000
  74
  75 #define PORT_STAT_C_CONNECTION  0x0001
  76 #define PORT_STAT_C_ENABLE      0x0002
  77 #define PORT_STAT_C_SUSPEND     0x0004
  78 #define PORT_STAT_C_OVERCURRENT 0x0008
  79 #define PORT_STAT_C_RESET       0x0010
  80
  81 #define PORT_CONNECTION         0
  82 #define PORT_ENABLE             1
  83 #define PORT_SUSPEND            2
  84 #define PORT_OVERCURRENT        3
  85 #define PORT_RESET              4
  86 #define PORT_POWER              8
  87 #define PORT_LOWSPEED           9
  88 #define PORT_HIGHSPEED          10
  89 #define PORT_C_CONNECTION       16
  90 #define PORT_C_ENABLE           17
  91 #define PORT_C_SUSPEND          18
  92 #define PORT_C_OVERCURRENT      19
  93 #define PORT_C_RESET            20
  94 #define PORT_TEST               21
  95 #define PORT_INDICATOR          22
  96
  97 /* same as Linux kernel root hubs */
  98
  99 enum {
 100     STR_MANUFACTURER = 1,
 101     STR_PRODUCT,
 102     STR_SERIALNUMBER,
 103 };
 104
 105 static const USBDescStrings desc_strings = {
 106     [STR_MANUFACTURER] = "QEMU",
 107     [STR_PRODUCT]      = "QEMU USB Hub",
 108     [STR_SERIALNUMBER] = "314159",
 109 };
 110
 111 static const USBDescIface desc_iface_hub = {
 112     .bInterfaceNumber              = 0,
 113     .bNumEndpoints                 = 1,
 114     .bInterfaceClass               = USB_CLASS_HUB,
 115     .eps = (USBDescEndpoint[]) {
 116         {
 117             .bEndpointAddress      = USB_DIR_IN | 0x01,
 118             .bmAttributes          = USB_ENDPOINT_XFER_INT,
 119             .wMaxPacketSize        = 1 + DIV_ROUND_UP(MAX_PORTS, 8),
 120             .bInterval             = 0xff,
 121         },
 122     }
 123 };
 124
 125 static const USBDescDevice desc_device_hub = {
 126     .bcdUSB                        = 0x0110,
 127     .bDeviceClass                  = USB_CLASS_HUB,
 128     .bMaxPacketSize0               = 8,
 129     .bNumConfigurations            = 1,
 130     .confs = (USBDescConfig[]) {
 131         {
 132             .bNumInterfaces        = 1,
 133             .bConfigurationValue   = 1,
 134             .bmAttributes          = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER |
 135                                      USB_CFG_ATT_WAKEUP,
 136             .nif = 1,
 137             .ifs = &desc_iface_hub,
 138         },
 139     },
 140 };
 141
 142 static const USBDesc desc_hub = {
 143     .id = {
 144         .idVendor          = 0x0409,
 145         .idProduct         = 0x55aa,
 146         .bcdDevice         = 0x0101,
 147         .iManufacturer     = STR_MANUFACTURER,
 148         .iProduct          = STR_PRODUCT,
 149         .iSerialNumber     = STR_SERIALNUMBER,
 150     },
 151     .full = &desc_device_hub,
 152     .str  = desc_strings,
 153 };
 154
 155 static const uint8_t qemu_hub_hub_descriptor[] =
 156 {
 157         0x00,                   /*  u8  bLength; patched in later */
 158         0x29,                   /*  u8  bDescriptorType; Hub-descriptor */
 159         0x00,                   /*  u8  bNbrPorts; (patched later) */
 160         0x0a,                   /* u16  wHubCharacteristics; */
 161         0x00,                   /*   (per-port OC, no power switching) */
 162         0x01,                   /*  u8  bPwrOn2pwrGood; 2ms */
 163         0x00                    /*  u8  bHubContrCurrent; 0 mA */
 164
 165         /* DeviceRemovable and PortPwrCtrlMask patched in later */
 166 };
 167
 168 static bool usb_hub_port_change(USBHubPort *port, uint16_t status)
 169 {
 170     bool notify = false;
 171
 172     if (status & 0x1f) {
 173         port->wPortChange |= status;
 174         notify = true;
 175     }
 176     return notify;
 177 }
 178
 179 static bool usb_hub_port_set(USBHubPort *port, uint16_t status)
 180 {
 181     if (port->wPortStatus & status) {
 182         return false;
 183     }
 184     port->wPortStatus |= status;
 185     return usb_hub_port_change(port, status);
 186 }
 187
 188 static bool usb_hub_port_clear(USBHubPort *port, uint16_t status)
 189 {
 190     if (!(port->wPortStatus & status)) {
 191         return false;
 192     }
 193     port->wPortStatus &= ~status;
 194     return usb_hub_port_change(port, status);
 195 }
 196
 197 static bool usb_hub_port_update(USBHubPort *port)
 198 {
 199     bool notify = false;
 200
 201     if (port->port.dev && port->port.dev->attached) {
 202         notify = usb_hub_port_set(port, PORT_STAT_CONNECTION);
 203         if (port->port.dev->speed == USB_SPEED_LOW) {
 204             usb_hub_port_set(port, PORT_STAT_LOW_SPEED);
 205         } else {
 206             usb_hub_port_clear(port, PORT_STAT_LOW_SPEED);
 207         }
 208     }
 209     return notify;
 210 }
 211
 212 static void usb_hub_port_update_timer(void *opaque)
 213 {
 214     USBHubState *s = opaque;
 215     bool notify = false;
 216     int i;
 217
 218     for (i = 0; i < s->num_ports; i++) {
 219         notify |= usb_hub_port_update(&s->ports[i]);
 220     }
 221     if (notify) {
 222         usb_wakeup(s->intr, 0);
 223     }
 224 }
 225
 226 static void usb_hub_attach(USBPort *port1)
 227 {
 228     USBHubState *s = port1->opaque;
 229     USBHubPort *port = &s->ports[port1->index];
 230
 231     trace_usb_hub_attach(s->dev.addr, port1->index + 1);
 232     usb_hub_port_update(port);
 233     usb_wakeup(s->intr, 0);
 234 }
 235
 236 static void usb_hub_detach(USBPort *port1)
 237 {
 238     USBHubState *s = port1->opaque;
 239     USBHubPort *port = &s->ports[port1->index];
 240
 241     trace_usb_hub_detach(s->dev.addr, port1->index + 1);
 242     usb_wakeup(s->intr, 0);
 243
 244     /* Let upstream know the device on this port is gone */
 245     s->dev.port->ops->child_detach(s->dev.port, port1->dev);
 246
 247     usb_hub_port_clear(port, PORT_STAT_CONNECTION);
 248     usb_hub_port_clear(port, PORT_STAT_ENABLE);
 249     usb_hub_port_clear(port, PORT_STAT_SUSPEND);
 250     usb_wakeup(s->intr, 0);
 251 }
 252
 253 static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
 254 {
 255     USBHubState *s = port1->opaque;
 256
 257     /* Pass along upstream */
 258     s->dev.port->ops->child_detach(s->dev.port, child);
 259 }
 260
 261 static void usb_hub_wakeup(USBPort *port1)
 262 {
 263     USBHubState *s = port1->opaque;
 264     USBHubPort *port = &s->ports[port1->index];
 265
 266     if (usb_hub_port_clear(port, PORT_STAT_SUSPEND)) {
 267         usb_wakeup(s->intr, 0);
 268     }
 269 }
 270
 271 static void usb_hub_complete(USBPort *port, USBPacket *packet)
 272 {
 273     USBHubState *s = port->opaque;
 274
 275     /*
 276      * Just pass it along upstream for now.
 277      *
 278      * If we ever implement usb 2.0 split transactions this will
 279      * become a little more complicated ...
 280      *
 281      * Can't use usb_packet_complete() here because packet->owner is
 282      * cleared already, go call the ->complete() callback directly
 283      * instead.
 284      */
 285     s->dev.port->ops->complete(s->dev.port, packet);
 286 }
 287
 288 static USBDevice *usb_hub_find_device(USBDevice *dev, uint8_t addr)
 289 {
 290     USBHubState *s = USB_HUB(dev);
 291     USBHubPort *port;
 292     USBDevice *downstream;
 293     int i;
 294
 295     for (i = 0; i < s->num_ports; i++) {
 296         port = &s->ports[i];
 297         if (!(port->wPortStatus & PORT_STAT_ENABLE)) {
 298             continue;
 299         }
 300         downstream = usb_find_device(&port->port, addr);
 301         if (downstream != NULL) {
 302             return downstream;
 303         }
 304     }
 305     return NULL;
 306 }
 307
 308 static void usb_hub_handle_reset(USBDevice *dev)
 309 {
 310     USBHubState *s = USB_HUB(dev);
 311     USBHubPort *port;
 312     int i;
 313
 314     trace_usb_hub_reset(s->dev.addr);
 315     for (i = 0; i < s->num_ports; i++) {
 316         port = s->ports + i;
 317         port->wPortStatus = 0;
 318         port->wPortChange = 0;
 319         usb_hub_port_set(port, PORT_STAT_POWER);
 320         usb_hub_port_update(port);
 321     }
 322 }
 323
 324 static const char *feature_name(int feature)
 325 {
 326     static const char *name[] = {
 327         [PORT_CONNECTION]    = "connection",
 328         [PORT_ENABLE]        = "enable",
 329         [PORT_SUSPEND]       = "suspend",
 330         [PORT_OVERCURRENT]   = "overcurrent",
 331         [PORT_RESET]         = "reset",
 332         [PORT_POWER]         = "power",
 333         [PORT_LOWSPEED]      = "lowspeed",
 334         [PORT_HIGHSPEED]     = "highspeed",
 335         [PORT_C_CONNECTION]  = "change-connection",
 336         [PORT_C_ENABLE]      = "change-enable",
 337         [PORT_C_SUSPEND]     = "change-suspend",
 338         [PORT_C_OVERCURRENT] = "change-overcurrent",
 339         [PORT_C_RESET]       = "change-reset",
 340         [PORT_TEST]          = "test",
 341         [PORT_INDICATOR]     = "indicator",
 342     };
 343     if (feature < 0 || feature >= ARRAY_SIZE(name)) {
 344         return "?";
 345     }
 346     return name[feature] ?: "?";
 347 }
 348
 349 static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
 350                int request, int value, int index, int length, uint8_t *data)
 351 {
 352     USBHubState *s = (USBHubState *)dev;
 353     int ret;
 354
 355     trace_usb_hub_control(s->dev.addr, request, value, index, length);
 356
 357     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
 358     if (ret >= 0) {
 359         return;
 360     }
 361
 362     switch(request) {
 363     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 364         if (value == 0 && index != 0x81) { /* clear ep halt */
 365             goto fail;
 366         }
 367         break;
 368         /* usb specific requests */
 369     case GetHubStatus:
 370         data[0] = 0;
 371         data[1] = 0;
 372         data[2] = 0;
 373         data[3] = 0;
 374         p->actual_length = 4;
 375         break;
 376     case GetPortStatus:
 377         {
 378             unsigned int n = index - 1;
 379             USBHubPort *port;
 380             if (n >= s->num_ports) {
 381                 goto fail;
 382             }
 383             port = &s->ports[n];
 384             trace_usb_hub_get_port_status(s->dev.addr, index,
 385                                           port->wPortStatus,
 386                                           port->wPortChange);
 387             data[0] = port->wPortStatus;
 388             data[1] = port->wPortStatus >> 8;
 389             data[2] = port->wPortChange;
 390             data[3] = port->wPortChange >> 8;
 391             p->actual_length = 4;
 392         }
 393         break;
 394     case SetHubFeature:
 395     case ClearHubFeature:
 396         if (value != 0 && value != 1) {
 397             goto fail;
 398         }
 399         break;
 400     case SetPortFeature:
 401         {
 402             unsigned int n = index - 1;
 403             USBHubPort *port;
 404             USBDevice *dev;
 405
 406             trace_usb_hub_set_port_feature(s->dev.addr, index,
 407                                            feature_name(value));
 408
 409             if (n >= s->num_ports) {
 410                 goto fail;
 411             }
 412             port = &s->ports[n];
 413             dev = port->port.dev;
 414             switch(value) {
 415             case PORT_SUSPEND:
 416                 port->wPortStatus |= PORT_STAT_SUSPEND;
 417                 break;
 418             case PORT_RESET:
 419                 usb_hub_port_set(port, PORT_STAT_RESET);
 420                 usb_hub_port_clear(port, PORT_STAT_RESET);
 421                 if (dev && dev->attached) {
 422                     usb_device_reset(dev);
 423                     usb_hub_port_set(port, PORT_STAT_ENABLE);
 424                 }
 425                 usb_wakeup(s->intr, 0);
 426                 break;
 427             case PORT_POWER:
 428                 if (s->port_power) {
 429                     int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 430                     usb_hub_port_set(port, PORT_STAT_POWER);
 431                     timer_mod(s->port_timer, now + 5000000); /* 5 ms */
 432                 }
 433                 break;
 434             default:
 435                 goto fail;
 436             }
 437         }
 438         break;
 439     case ClearPortFeature:
 440         {
 441             unsigned int n = index - 1;
 442             USBHubPort *port;
 443
 444             trace_usb_hub_clear_port_feature(s->dev.addr, index,
 445                                              feature_name(value));
 446
 447             if (n >= s->num_ports) {
 448                 goto fail;
 449             }
 450             port = &s->ports[n];
 451             switch(value) {
 452             case PORT_ENABLE:
 453                 port->wPortStatus &= ~PORT_STAT_ENABLE;
 454                 break;
 455             case PORT_C_ENABLE:
 456                 port->wPortChange &= ~PORT_STAT_C_ENABLE;
 457                 break;
 458             case PORT_SUSPEND:
 459                 usb_hub_port_clear(port, PORT_STAT_SUSPEND);
 460                 break;
 461             case PORT_C_SUSPEND:
 462                 port->wPortChange &= ~PORT_STAT_C_SUSPEND;
 463                 break;
 464             case PORT_C_CONNECTION:
 465                 port->wPortChange &= ~PORT_STAT_C_CONNECTION;
 466                 break;
 467             case PORT_C_OVERCURRENT:
 468                 port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
 469                 break;
 470             case PORT_C_RESET:
 471                 port->wPortChange &= ~PORT_STAT_C_RESET;
 472                 break;
 473             case PORT_POWER:
 474                 if (s->port_power) {
 475                     usb_hub_port_clear(port, PORT_STAT_POWER);
 476                     usb_hub_port_clear(port, PORT_STAT_CONNECTION);
 477                     usb_hub_port_clear(port, PORT_STAT_ENABLE);
 478                     usb_hub_port_clear(port, PORT_STAT_SUSPEND);
 479                     port->wPortChange = 0;
 480                 }
 481             default:
 482                 goto fail;
 483             }
 484         }
 485         break;
 486     case GetHubDescriptor:
 487         {
 488             unsigned int n, limit, var_hub_size = 0;
 489             memcpy(data, qemu_hub_hub_descriptor,
 490                    sizeof(qemu_hub_hub_descriptor));
 491             data[2] = s->num_ports;
 492
 493             if (s->port_power) {
 494                 data[3] &= ~0x03;
 495                 data[3] |= 0x01;
 496             }
 497
 498             /* fill DeviceRemovable bits */
 499             limit = DIV_ROUND_UP(s->num_ports + 1, 8) + 7;
 500             for (n = 7; n < limit; n++) {
 501                 data[n] = 0x00;
 502                 var_hub_size++;
 503             }
 504
 505             /* fill PortPwrCtrlMask bits */
 506             limit = limit + DIV_ROUND_UP(s->num_ports, 8);
 507             for (;n < limit; n++) {
 508                 data[n] = 0xff;
 509                 var_hub_size++;
 510             }
 511
 512             p->actual_length = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
 513             data[0] = p->actual_length;
 514             break;
 515         }
 516     default:
 517     fail:
 518         p->status = USB_RET_STALL;
 519         break;
 520     }
 521 }
 522
 523 static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
 524 {
 525     USBHubState *s = (USBHubState *)dev;
 526
 527     switch(p->pid) {
 528     case USB_TOKEN_IN:
 529         if (p->ep->nr == 1) {
 530             USBHubPort *port;
 531             unsigned int status;
 532             uint8_t buf[4];
 533             int i, n;
 534             n = DIV_ROUND_UP(s->num_ports + 1, 8);
 535             if (p->iov.size == 1) { /* FreeBSD workaround */
 536                 n = 1;
 537             } else if (n > p->iov.size) {
 538                 p->status = USB_RET_BABBLE;
 539                 return;
 540             }
 541             status = 0;
 542             for (i = 0; i < s->num_ports; i++) {
 543                 port = &s->ports[i];
 544                 if (port->wPortChange)
 545                     status |= (1 << (i + 1));
 546             }
 547             if (status != 0) {
 548                 trace_usb_hub_status_report(s->dev.addr, status);
 549                 for(i = 0; i < n; i++) {
 550                     buf[i] = status >> (8 * i);
 551                 }
 552                 usb_packet_copy(p, buf, n);
 553             } else {
 554                 p->status = USB_RET_NAK; /* usb11 11.13.1 */
 555             }
 556         } else {
 557             goto fail;
 558         }
 559         break;
 560     case USB_TOKEN_OUT:
 561     default:
 562     fail:
 563         p->status = USB_RET_STALL;
 564         break;
 565     }
 566 }
 567
 568 static void usb_hub_unrealize(USBDevice *dev, Error **errp)
 569 {
 570     USBHubState *s = (USBHubState *)dev;
 571     int i;
 572
 573     for (i = 0; i < s->num_ports; i++) {
 574         usb_unregister_port(usb_bus_from_device(dev),
 575                             &s->ports[i].port);
 576     }
 577
 578     timer_del(s->port_timer);
 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 = (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 = (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 = (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 * []) {
 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)