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 #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 *dev;
 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             dev = 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 (dev && dev->attached) {
 423                     usb_device_reset(dev);
 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 = (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)