hw/usb/bus.c

   1 #include "hw/hw.h"
   2 #include "hw/usb.h"
   3 #include "hw/qdev.h"
   4 #include "sysemu.h"
   5 #include "monitor.h"
   6 #include "trace.h"
   7
   8 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
   9
  10 static char *usb_get_dev_path(DeviceState *dev);
  11 static char *usb_get_fw_dev_path(DeviceState *qdev);
  12 static int usb_qdev_exit(DeviceState *qdev);
  13
  14 static Property usb_props[] = {
  15     DEFINE_PROP_STRING("port", USBDevice, port_path),
  16     DEFINE_PROP_BIT("full-path", USBDevice, flags,
  17                     USB_DEV_FLAG_FULL_PATH, true),
  18     DEFINE_PROP_END_OF_LIST()
  19 };
  20
  21 static void usb_bus_class_init(ObjectClass *klass, void *data)
  22 {
  23     BusClass *k = BUS_CLASS(klass);
  24
  25     k->print_dev = usb_bus_dev_print;
  26     k->get_dev_path = usb_get_dev_path;
  27     k->get_fw_dev_path = usb_get_fw_dev_path;
  28 }
  29
  30 static const TypeInfo usb_bus_info = {
  31     .name = TYPE_USB_BUS,
  32     .parent = TYPE_BUS,
  33     .instance_size = sizeof(USBBus),
  34     .class_init = usb_bus_class_init,
  35 };
  36
  37 static int next_usb_bus = 0;
  38 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  39
  40 static int usb_device_post_load(void *opaque, int version_id)
  41 {
  42     USBDevice *dev = opaque;
  43
  44     if (dev->state == USB_STATE_NOTATTACHED) {
  45         dev->attached = 0;
  46     } else {
  47         dev->attached = 1;
  48     }
  49     return 0;
  50 }
  51
  52 const VMStateDescription vmstate_usb_device = {
  53     .name = "USBDevice",
  54     .version_id = 1,
  55     .minimum_version_id = 1,
  56     .post_load = usb_device_post_load,
  57     .fields = (VMStateField []) {
  58         VMSTATE_UINT8(addr, USBDevice),
  59         VMSTATE_INT32(state, USBDevice),
  60         VMSTATE_INT32(remote_wakeup, USBDevice),
  61         VMSTATE_INT32(setup_state, USBDevice),
  62         VMSTATE_INT32(setup_len, USBDevice),
  63         VMSTATE_INT32(setup_index, USBDevice),
  64         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  65         VMSTATE_END_OF_LIST(),
  66     }
  67 };
  68
  69 void usb_bus_new(USBBus *bus, USBBusOps *ops, DeviceState *host)
  70 {
  71     qbus_create_inplace(&bus->qbus, TYPE_USB_BUS, host, NULL);
  72     bus->ops = ops;
  73     bus->busnr = next_usb_bus++;
  74     bus->qbus.allow_hotplug = 1; /* Yes, we can */
  75     QTAILQ_INIT(&bus->free);
  76     QTAILQ_INIT(&bus->used);
  77     QTAILQ_INSERT_TAIL(&busses, bus, next);
  78 }
  79
  80 USBBus *usb_bus_find(int busnr)
  81 {
  82     USBBus *bus;
  83
  84     if (-1 == busnr)
  85         return QTAILQ_FIRST(&busses);
  86     QTAILQ_FOREACH(bus, &busses, next) {
  87         if (bus->busnr == busnr)
  88             return bus;
  89     }
  90     return NULL;
  91 }
  92
  93 static int usb_device_init(USBDevice *dev)
  94 {
  95     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
  96     if (klass->init) {
  97         return klass->init(dev);
  98     }
  99     return 0;
 100 }
 101
 102 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
 103 {
 104     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 105     if (klass->find_device) {
 106         return klass->find_device(dev, addr);
 107     }
 108     return NULL;
 109 }
 110
 111 static void usb_device_handle_destroy(USBDevice *dev)
 112 {
 113     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 114     if (klass->handle_destroy) {
 115         klass->handle_destroy(dev);
 116     }
 117 }
 118
 119 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
 120 {
 121     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 122     if (klass->cancel_packet) {
 123         klass->cancel_packet(dev, p);
 124     }
 125 }
 126
 127 void usb_device_handle_attach(USBDevice *dev)
 128 {
 129     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 130     if (klass->handle_attach) {
 131         klass->handle_attach(dev);
 132     }
 133 }
 134
 135 void usb_device_handle_reset(USBDevice *dev)
 136 {
 137     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 138     if (klass->handle_reset) {
 139         klass->handle_reset(dev);
 140     }
 141 }
 142
 143 int usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
 144                               int value, int index, int length, uint8_t *data)
 145 {
 146     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 147     if (klass->handle_control) {
 148         return klass->handle_control(dev, p, request, value, index, length,
 149                                          data);
 150     }
 151     return -ENOSYS;
 152 }
 153
 154 int usb_device_handle_data(USBDevice *dev, USBPacket *p)
 155 {
 156     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 157     if (klass->handle_data) {
 158         return klass->handle_data(dev, p);
 159     }
 160     return -ENOSYS;
 161 }
 162
 163 const char *usb_device_get_product_desc(USBDevice *dev)
 164 {
 165     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 166     return klass->product_desc;
 167 }
 168
 169 const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
 170 {
 171     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 172     return klass->usb_desc;
 173 }
 174
 175 void usb_device_set_interface(USBDevice *dev, int interface,
 176                               int alt_old, int alt_new)
 177 {
 178     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 179     if (klass->set_interface) {
 180         klass->set_interface(dev, interface, alt_old, alt_new);
 181     }
 182 }
 183
 184 static int usb_qdev_init(DeviceState *qdev)
 185 {
 186     USBDevice *dev = USB_DEVICE(qdev);
 187     int rc;
 188
 189     pstrcpy(dev->product_desc, sizeof(dev->product_desc),
 190             usb_device_get_product_desc(dev));
 191     dev->auto_attach = 1;
 192     QLIST_INIT(&dev->strings);
 193     usb_ep_init(dev);
 194     rc = usb_claim_port(dev);
 195     if (rc != 0) {
 196         return rc;
 197     }
 198     rc = usb_device_init(dev);
 199     if (rc != 0) {
 200         usb_release_port(dev);
 201         return rc;
 202     }
 203     if (dev->auto_attach) {
 204         rc = usb_device_attach(dev);
 205         if (rc != 0) {
 206             usb_qdev_exit(qdev);
 207             return rc;
 208         }
 209     }
 210     return 0;
 211 }
 212
 213 static int usb_qdev_exit(DeviceState *qdev)
 214 {
 215     USBDevice *dev = USB_DEVICE(qdev);
 216
 217     if (dev->attached) {
 218         usb_device_detach(dev);
 219     }
 220     usb_device_handle_destroy(dev);
 221     if (dev->port) {
 222         usb_release_port(dev);
 223     }
 224     return 0;
 225 }
 226
 227 typedef struct LegacyUSBFactory
 228 {
 229     const char *name;
 230     const char *usbdevice_name;
 231     USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
 232 } LegacyUSBFactory;
 233
 234 static GSList *legacy_usb_factory;
 235
 236 void usb_legacy_register(const char *typename, const char *usbdevice_name,
 237                          USBDevice *(*usbdevice_init)(USBBus *bus,
 238                                                       const char *params))
 239 {
 240     if (usbdevice_name) {
 241         LegacyUSBFactory *f = g_malloc0(sizeof(*f));
 242         f->name = typename;
 243         f->usbdevice_name = usbdevice_name;
 244         f->usbdevice_init = usbdevice_init;
 245         legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
 246     }
 247 }
 248
 249 USBDevice *usb_create(USBBus *bus, const char *name)
 250 {
 251     DeviceState *dev;
 252
 253     dev = qdev_create(&bus->qbus, name);
 254     return USB_DEVICE(dev);
 255 }
 256
 257 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 258 {
 259     USBDevice *dev = usb_create(bus, name);
 260     int rc;
 261
 262     if (!dev) {
 263         error_report("Failed to create USB device '%s'", name);
 264         return NULL;
 265     }
 266     rc = qdev_init(&dev->qdev);
 267     if (rc < 0) {
 268         error_report("Failed to initialize USB device '%s'", name);
 269         return NULL;
 270     }
 271     return dev;
 272 }
 273
 274 static void usb_fill_port(USBPort *port, void *opaque, int index,
 275                           USBPortOps *ops, int speedmask)
 276 {
 277     port->opaque = opaque;
 278     port->index = index;
 279     port->ops = ops;
 280     port->speedmask = speedmask;
 281     usb_port_location(port, NULL, index + 1);
 282 }
 283
 284 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 285                        USBPortOps *ops, int speedmask)
 286 {
 287     usb_fill_port(port, opaque, index, ops, speedmask);
 288     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 289     bus->nfree++;
 290 }
 291
 292 int usb_register_companion(const char *masterbus, USBPort *ports[],
 293                            uint32_t portcount, uint32_t firstport,
 294                            void *opaque, USBPortOps *ops, int speedmask)
 295 {
 296     USBBus *bus;
 297     int i;
 298
 299     QTAILQ_FOREACH(bus, &busses, next) {
 300         if (strcmp(bus->qbus.name, masterbus) == 0) {
 301             break;
 302         }
 303     }
 304
 305     if (!bus || !bus->ops->register_companion) {
 306         qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
 307                       "an USB masterbus");
 308         if (bus) {
 309             error_printf_unless_qmp(
 310                 "USB bus '%s' does not allow companion controllers\n",
 311                 masterbus);
 312         }
 313         return -1;
 314     }
 315
 316     for (i = 0; i < portcount; i++) {
 317         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 318     }
 319
 320     return bus->ops->register_companion(bus, ports, portcount, firstport);
 321 }
 322
 323 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 324 {
 325     if (upstream) {
 326         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 327                  upstream->path, portnr);
 328     } else {
 329         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 330     }
 331 }
 332
 333 void usb_unregister_port(USBBus *bus, USBPort *port)
 334 {
 335     if (port->dev)
 336         qdev_free(&port->dev->qdev);
 337     QTAILQ_REMOVE(&bus->free, port, next);
 338     bus->nfree--;
 339 }
 340
 341 int usb_claim_port(USBDevice *dev)
 342 {
 343     USBBus *bus = usb_bus_from_device(dev);
 344     USBPort *port;
 345
 346     assert(dev->port == NULL);
 347
 348     if (dev->port_path) {
 349         QTAILQ_FOREACH(port, &bus->free, next) {
 350             if (strcmp(port->path, dev->port_path) == 0) {
 351                 break;
 352             }
 353         }
 354         if (port == NULL) {
 355             error_report("Error: usb port %s (bus %s) not found (in use?)",
 356                          dev->port_path, bus->qbus.name);
 357             return -1;
 358         }
 359     } else {
 360         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 361             /* Create a new hub and chain it on */
 362             usb_create_simple(bus, "usb-hub");
 363         }
 364         if (bus->nfree == 0) {
 365             error_report("Error: tried to attach usb device %s to a bus "
 366                          "with no free ports", dev->product_desc);
 367             return -1;
 368         }
 369         port = QTAILQ_FIRST(&bus->free);
 370     }
 371     trace_usb_port_claim(bus->busnr, port->path);
 372
 373     QTAILQ_REMOVE(&bus->free, port, next);
 374     bus->nfree--;
 375
 376     dev->port = port;
 377     port->dev = dev;
 378
 379     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 380     bus->nused++;
 381     return 0;
 382 }
 383
 384 void usb_release_port(USBDevice *dev)
 385 {
 386     USBBus *bus = usb_bus_from_device(dev);
 387     USBPort *port = dev->port;
 388
 389     assert(port != NULL);
 390     trace_usb_port_release(bus->busnr, port->path);
 391
 392     QTAILQ_REMOVE(&bus->used, port, next);
 393     bus->nused--;
 394
 395     dev->port = NULL;
 396     port->dev = NULL;
 397
 398     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 399     bus->nfree++;
 400 }
 401
 402 int usb_device_attach(USBDevice *dev)
 403 {
 404     USBBus *bus = usb_bus_from_device(dev);
 405     USBPort *port = dev->port;
 406
 407     assert(port != NULL);
 408     assert(!dev->attached);
 409     trace_usb_port_attach(bus->busnr, port->path);
 410
 411     if (!(port->speedmask & dev->speedmask)) {
 412         error_report("Warning: speed mismatch trying to attach "
 413                      "usb device %s to bus %s",
 414                      dev->product_desc, bus->qbus.name);
 415         return -1;
 416     }
 417
 418     dev->attached++;
 419     usb_attach(port);
 420
 421     return 0;
 422 }
 423
 424 int usb_device_detach(USBDevice *dev)
 425 {
 426     USBBus *bus = usb_bus_from_device(dev);
 427     USBPort *port = dev->port;
 428
 429     assert(port != NULL);
 430     assert(dev->attached);
 431     trace_usb_port_detach(bus->busnr, port->path);
 432
 433     usb_detach(port);
 434     dev->attached--;
 435     return 0;
 436 }
 437
 438 int usb_device_delete_addr(int busnr, int addr)
 439 {
 440     USBBus *bus;
 441     USBPort *port;
 442     USBDevice *dev;
 443
 444     bus = usb_bus_find(busnr);
 445     if (!bus)
 446         return -1;
 447
 448     QTAILQ_FOREACH(port, &bus->used, next) {
 449         if (port->dev->addr == addr)
 450             break;
 451     }
 452     if (!port)
 453         return -1;
 454     dev = port->dev;
 455
 456     qdev_free(&dev->qdev);
 457     return 0;
 458 }
 459
 460 static const char *usb_speed(unsigned int speed)
 461 {
 462     static const char *txt[] = {
 463         [ USB_SPEED_LOW  ] = "1.5",
 464         [ USB_SPEED_FULL ] = "12",
 465         [ USB_SPEED_HIGH ] = "480",
 466         [ USB_SPEED_SUPER ] = "5000",
 467     };
 468     if (speed >= ARRAY_SIZE(txt))
 469         return "?";
 470     return txt[speed];
 471 }
 472
 473 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 474 {
 475     USBDevice *dev = USB_DEVICE(qdev);
 476     USBBus *bus = usb_bus_from_device(dev);
 477
 478     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 479                    indent, "", bus->busnr, dev->addr,
 480                    dev->port ? dev->port->path : "-",
 481                    usb_speed(dev->speed), dev->product_desc,
 482                    dev->attached ? ", attached" : "");
 483 }
 484
 485 static char *usb_get_dev_path(DeviceState *qdev)
 486 {
 487     USBDevice *dev = USB_DEVICE(qdev);
 488     DeviceState *hcd = qdev->parent_bus->parent;
 489     char *id = NULL;
 490
 491     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 492         id = qdev_get_dev_path(hcd);
 493     }
 494     if (id) {
 495         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 496         g_free(id);
 497         return ret;
 498     } else {
 499         return g_strdup(dev->port->path);
 500     }
 501 }
 502
 503 static char *usb_get_fw_dev_path(DeviceState *qdev)
 504 {
 505     USBDevice *dev = USB_DEVICE(qdev);
 506     char *fw_path, *in;
 507     ssize_t pos = 0, fw_len;
 508     long nr;
 509
 510     fw_len = 32 + strlen(dev->port->path) * 6;
 511     fw_path = g_malloc(fw_len);
 512     in = dev->port->path;
 513     while (fw_len - pos > 0) {
 514         nr = strtol(in, &in, 10);
 515         if (in[0] == '.') {
 516             /* some hub between root port and device */
 517             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);
 518             in++;
 519         } else {
 520             /* the device itself */
 521             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",
 522                             qdev_fw_name(qdev), nr);
 523             break;
 524         }
 525     }
 526     return fw_path;
 527 }
 528
 529 void usb_info(Monitor *mon)
 530 {
 531     USBBus *bus;
 532     USBDevice *dev;
 533     USBPort *port;
 534
 535     if (QTAILQ_EMPTY(&busses)) {
 536         monitor_printf(mon, "USB support not enabled\n");
 537         return;
 538     }
 539
 540     QTAILQ_FOREACH(bus, &busses, next) {
 541         QTAILQ_FOREACH(port, &bus->used, next) {
 542             dev = port->dev;
 543             if (!dev)
 544                 continue;
 545             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 546                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 547                            dev->product_desc);
 548         }
 549     }
 550 }
 551
 552 /* handle legacy -usbdevice cmd line option */
 553 USBDevice *usbdevice_create(const char *cmdline)
 554 {
 555     USBBus *bus = usb_bus_find(-1 /* any */);
 556     LegacyUSBFactory *f = NULL;
 557     GSList *i;
 558     char driver[32];
 559     const char *params;
 560     int len;
 561
 562     params = strchr(cmdline,':');
 563     if (params) {
 564         params++;
 565         len = params - cmdline;
 566         if (len > sizeof(driver))
 567             len = sizeof(driver);
 568         pstrcpy(driver, len, cmdline);
 569     } else {
 570         params = "";
 571         pstrcpy(driver, sizeof(driver), cmdline);
 572     }
 573
 574     for (i = legacy_usb_factory; i; i = i->next) {
 575         f = i->data;
 576         if (strcmp(f->usbdevice_name, driver) == 0) {
 577             break;
 578         }
 579     }
 580     if (i == NULL) {
 581 #if 0
 582         /* no error because some drivers are not converted (yet) */
 583         error_report("usbdevice %s not found", driver);
 584 #endif
 585         return NULL;
 586     }
 587
 588     if (!f->usbdevice_init) {
 589         if (*params) {
 590             error_report("usbdevice %s accepts no params", driver);
 591             return NULL;
 592         }
 593         return usb_create_simple(bus, f->name);
 594     }
 595     return f->usbdevice_init(bus, params);
 596 }
 597
 598 static void usb_device_class_init(ObjectClass *klass, void *data)
 599 {
 600     DeviceClass *k = DEVICE_CLASS(klass);
 601     k->bus_type = TYPE_USB_BUS;
 602     k->init     = usb_qdev_init;
 603     k->unplug   = qdev_simple_unplug_cb;
 604     k->exit     = usb_qdev_exit;
 605     k->props    = usb_props;
 606 }
 607
 608 static TypeInfo usb_device_type_info = {
 609     .name = TYPE_USB_DEVICE,
 610     .parent = TYPE_DEVICE,
 611     .instance_size = sizeof(USBDevice),
 612     .abstract = true,
 613     .class_size = sizeof(USBDeviceClass),
 614     .class_init = usb_device_class_init,
 615 };
 616
 617 static void usb_register_types(void)
 618 {
 619     type_register_static(&usb_bus_info);
 620     type_register_static(&usb_device_type_info);
 621 }
 622
 623 type_init(usb_register_types)