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