hw/usb-bus.c

   1 #include "hw.h"
   2 #include "usb.h"
   3 #include "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
  13 static struct BusInfo usb_bus_info = {
  14     .name      = "USB",
  15     .size      = sizeof(USBBus),
  16     .print_dev = usb_bus_dev_print,
  17     .get_dev_path = usb_get_dev_path,
  18     .get_fw_dev_path = usb_get_fw_dev_path,
  19     .props      = (Property[]) {
  20         DEFINE_PROP_STRING("port", USBDevice, port_path),
  21         DEFINE_PROP_END_OF_LIST()
  22     },
  23 };
  24 static int next_usb_bus = 0;
  25 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  26
  27 const VMStateDescription vmstate_usb_device = {
  28     .name = "USBDevice",
  29     .version_id = 1,
  30     .minimum_version_id = 1,
  31     .fields = (VMStateField []) {
  32         VMSTATE_UINT8(addr, USBDevice),
  33         VMSTATE_INT32(state, USBDevice),
  34         VMSTATE_INT32(remote_wakeup, USBDevice),
  35         VMSTATE_INT32(setup_state, USBDevice),
  36         VMSTATE_INT32(setup_len, USBDevice),
  37         VMSTATE_INT32(setup_index, USBDevice),
  38         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  39         VMSTATE_END_OF_LIST(),
  40     }
  41 };
  42
  43 void usb_bus_new(USBBus *bus, USBBusOps *ops, DeviceState *host)
  44 {
  45     qbus_create_inplace(&bus->qbus, &usb_bus_info, host, NULL);
  46     bus->ops = ops;
  47     bus->busnr = next_usb_bus++;
  48     bus->qbus.allow_hotplug = 1; /* Yes, we can */
  49     QTAILQ_INIT(&bus->free);
  50     QTAILQ_INIT(&bus->used);
  51     QTAILQ_INSERT_TAIL(&busses, bus, next);
  52 }
  53
  54 USBBus *usb_bus_find(int busnr)
  55 {
  56     USBBus *bus;
  57
  58     if (-1 == busnr)
  59         return QTAILQ_FIRST(&busses);
  60     QTAILQ_FOREACH(bus, &busses, next) {
  61         if (bus->busnr == busnr)
  62             return bus;
  63     }
  64     return NULL;
  65 }
  66
  67 static int usb_qdev_init(DeviceState *qdev, DeviceInfo *base)
  68 {
  69     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
  70     USBDeviceInfo *info = DO_UPCAST(USBDeviceInfo, qdev, base);
  71     int rc;
  72
  73     pstrcpy(dev->product_desc, sizeof(dev->product_desc), info->product_desc);
  74     dev->info = info;
  75     dev->auto_attach = 1;
  76     QLIST_INIT(&dev->strings);
  77     rc = usb_claim_port(dev);
  78     if (rc == 0) {
  79         rc = dev->info->init(dev);
  80     }
  81     if (rc == 0 && dev->auto_attach) {
  82         rc = usb_device_attach(dev);
  83     }
  84     return rc;
  85 }
  86
  87 static int usb_qdev_exit(DeviceState *qdev)
  88 {
  89     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
  90
  91     if (dev->attached) {
  92         usb_device_detach(dev);
  93     }
  94     if (dev->info->handle_destroy) {
  95         dev->info->handle_destroy(dev);
  96     }
  97     if (dev->port) {
  98         usb_release_port(dev);
  99     }
 100     return 0;
 101 }
 102
 103 void usb_qdev_register(USBDeviceInfo *info)
 104 {
 105     info->qdev.bus_info = &usb_bus_info;
 106     info->qdev.init     = usb_qdev_init;
 107     info->qdev.unplug   = qdev_simple_unplug_cb;
 108     info->qdev.exit     = usb_qdev_exit;
 109     qdev_register(&info->qdev);
 110 }
 111
 112 void usb_qdev_register_many(USBDeviceInfo *info)
 113 {
 114     while (info->qdev.name) {
 115         usb_qdev_register(info);
 116         info++;
 117     }
 118 }
 119
 120 USBDevice *usb_create(USBBus *bus, const char *name)
 121 {
 122     DeviceState *dev;
 123
 124 #if 1
 125     /* temporary stopgap until all usb is properly qdev-ified */
 126     if (!bus) {
 127         bus = usb_bus_find(-1);
 128         if (!bus)
 129             return NULL;
 130         error_report("%s: no bus specified, using \"%s\" for \"%s\"\n",
 131                 __FUNCTION__, bus->qbus.name, name);
 132     }
 133 #endif
 134
 135     dev = qdev_create(&bus->qbus, name);
 136     return DO_UPCAST(USBDevice, qdev, dev);
 137 }
 138
 139 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 140 {
 141     USBDevice *dev = usb_create(bus, name);
 142     if (!dev) {
 143         hw_error("Failed to create USB device '%s'\n", name);
 144     }
 145     qdev_init_nofail(&dev->qdev);
 146     return dev;
 147 }
 148
 149 static void usb_fill_port(USBPort *port, void *opaque, int index,
 150                           USBPortOps *ops, int speedmask)
 151 {
 152     port->opaque = opaque;
 153     port->index = index;
 154     port->ops = ops;
 155     port->speedmask = speedmask;
 156     usb_port_location(port, NULL, index + 1);
 157 }
 158
 159 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 160                        USBPortOps *ops, int speedmask)
 161 {
 162     usb_fill_port(port, opaque, index, ops, speedmask);
 163     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 164     bus->nfree++;
 165 }
 166
 167 int usb_register_companion(const char *masterbus, USBPort *ports[],
 168                            uint32_t portcount, uint32_t firstport,
 169                            void *opaque, USBPortOps *ops, int speedmask)
 170 {
 171     USBBus *bus;
 172     int i;
 173
 174     QTAILQ_FOREACH(bus, &busses, next) {
 175         if (strcmp(bus->qbus.name, masterbus) == 0) {
 176             break;
 177         }
 178     }
 179
 180     if (!bus || !bus->ops->register_companion) {
 181         qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
 182                       "an USB masterbus");
 183         if (bus) {
 184             error_printf_unless_qmp(
 185                 "USB bus '%s' does not allow companion controllers\n",
 186                 masterbus);
 187         }
 188         return -1;
 189     }
 190
 191     for (i = 0; i < portcount; i++) {
 192         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 193     }
 194
 195     return bus->ops->register_companion(bus, ports, portcount, firstport);
 196 }
 197
 198 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 199 {
 200     if (upstream) {
 201         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 202                  upstream->path, portnr);
 203     } else {
 204         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 205     }
 206 }
 207
 208 void usb_unregister_port(USBBus *bus, USBPort *port)
 209 {
 210     if (port->dev)
 211         qdev_free(&port->dev->qdev);
 212     QTAILQ_REMOVE(&bus->free, port, next);
 213     bus->nfree--;
 214 }
 215
 216 int usb_claim_port(USBDevice *dev)
 217 {
 218     USBBus *bus = usb_bus_from_device(dev);
 219     USBPort *port;
 220
 221     assert(dev->port == NULL);
 222
 223     if (dev->port_path) {
 224         QTAILQ_FOREACH(port, &bus->free, next) {
 225             if (strcmp(port->path, dev->port_path) == 0) {
 226                 break;
 227             }
 228         }
 229         if (port == NULL) {
 230             error_report("Error: usb port %s (bus %s) not found (in use?)\n",
 231                          dev->port_path, bus->qbus.name);
 232             return -1;
 233         }
 234     } else {
 235         if (bus->nfree == 1 && strcmp(dev->qdev.info->name, "usb-hub") != 0) {
 236             /* Create a new hub and chain it on */
 237             usb_create_simple(bus, "usb-hub");
 238         }
 239         if (bus->nfree == 0) {
 240             error_report("Error: tried to attach usb device %s to a bus "
 241                          "with no free ports\n", dev->product_desc);
 242             return -1;
 243         }
 244         port = QTAILQ_FIRST(&bus->free);
 245     }
 246     trace_usb_port_claim(bus->busnr, port->path);
 247
 248     QTAILQ_REMOVE(&bus->free, port, next);
 249     bus->nfree--;
 250
 251     dev->port = port;
 252     port->dev = dev;
 253
 254     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 255     bus->nused++;
 256     return 0;
 257 }
 258
 259 void usb_release_port(USBDevice *dev)
 260 {
 261     USBBus *bus = usb_bus_from_device(dev);
 262     USBPort *port = dev->port;
 263
 264     assert(port != NULL);
 265     trace_usb_port_release(bus->busnr, port->path);
 266
 267     QTAILQ_REMOVE(&bus->used, port, next);
 268     bus->nused--;
 269
 270     dev->port = NULL;
 271     port->dev = NULL;
 272
 273     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 274     bus->nfree++;
 275 }
 276
 277 int usb_device_attach(USBDevice *dev)
 278 {
 279     USBBus *bus = usb_bus_from_device(dev);
 280     USBPort *port = dev->port;
 281
 282     assert(port != NULL);
 283     assert(!dev->attached);
 284     trace_usb_port_attach(bus->busnr, port->path);
 285
 286     if (!(port->speedmask & dev->speedmask)) {
 287         error_report("Warning: speed mismatch trying to attach "
 288                      "usb device %s to bus %s\n",
 289                      dev->product_desc, bus->qbus.name);
 290         return -1;
 291     }
 292
 293     dev->attached++;
 294     usb_attach(port);
 295
 296     return 0;
 297 }
 298
 299 int usb_device_detach(USBDevice *dev)
 300 {
 301     USBBus *bus = usb_bus_from_device(dev);
 302     USBPort *port = dev->port;
 303
 304     assert(port != NULL);
 305     assert(dev->attached);
 306     trace_usb_port_detach(bus->busnr, port->path);
 307
 308     usb_detach(port);
 309     dev->attached--;
 310     return 0;
 311 }
 312
 313 int usb_device_delete_addr(int busnr, int addr)
 314 {
 315     USBBus *bus;
 316     USBPort *port;
 317     USBDevice *dev;
 318
 319     bus = usb_bus_find(busnr);
 320     if (!bus)
 321         return -1;
 322
 323     QTAILQ_FOREACH(port, &bus->used, next) {
 324         if (port->dev->addr == addr)
 325             break;
 326     }
 327     if (!port)
 328         return -1;
 329     dev = port->dev;
 330
 331     qdev_free(&dev->qdev);
 332     return 0;
 333 }
 334
 335 static const char *usb_speed(unsigned int speed)
 336 {
 337     static const char *txt[] = {
 338         [ USB_SPEED_LOW  ] = "1.5",
 339         [ USB_SPEED_FULL ] = "12",
 340         [ USB_SPEED_HIGH ] = "480",
 341         [ USB_SPEED_SUPER ] = "5000",
 342     };
 343     if (speed >= ARRAY_SIZE(txt))
 344         return "?";
 345     return txt[speed];
 346 }
 347
 348 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 349 {
 350     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 351     USBBus *bus = usb_bus_from_device(dev);
 352
 353     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 354                    indent, "", bus->busnr, dev->addr,
 355                    dev->port ? dev->port->path : "-",
 356                    usb_speed(dev->speed), dev->product_desc,
 357                    dev->attached ? ", attached" : "");
 358 }
 359
 360 static char *usb_get_dev_path(DeviceState *qdev)
 361 {
 362     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 363     return g_strdup(dev->port->path);
 364 }
 365
 366 static char *usb_get_fw_dev_path(DeviceState *qdev)
 367 {
 368     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 369     char *fw_path, *in;
 370     ssize_t pos = 0, fw_len;
 371     long nr;
 372
 373     fw_len = 32 + strlen(dev->port->path) * 6;
 374     fw_path = g_malloc(fw_len);
 375     in = dev->port->path;
 376     while (fw_len - pos > 0) {
 377         nr = strtol(in, &in, 10);
 378         if (in[0] == '.') {
 379             /* some hub between root port and device */
 380             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);
 381             in++;
 382         } else {
 383             /* the device itself */
 384             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",
 385                             qdev_fw_name(qdev), nr);
 386             break;
 387         }
 388     }
 389     return fw_path;
 390 }
 391
 392 void usb_info(Monitor *mon)
 393 {
 394     USBBus *bus;
 395     USBDevice *dev;
 396     USBPort *port;
 397
 398     if (QTAILQ_EMPTY(&busses)) {
 399         monitor_printf(mon, "USB support not enabled\n");
 400         return;
 401     }
 402
 403     QTAILQ_FOREACH(bus, &busses, next) {
 404         QTAILQ_FOREACH(port, &bus->used, next) {
 405             dev = port->dev;
 406             if (!dev)
 407                 continue;
 408             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 409                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 410                            dev->product_desc);
 411         }
 412     }
 413 }
 414
 415 /* handle legacy -usbdevice cmd line option */
 416 USBDevice *usbdevice_create(const char *cmdline)
 417 {
 418     USBBus *bus = usb_bus_find(-1 /* any */);
 419     DeviceInfo *info;
 420     USBDeviceInfo *usb;
 421     char driver[32];
 422     const char *params;
 423     int len;
 424
 425     params = strchr(cmdline,':');
 426     if (params) {
 427         params++;
 428         len = params - cmdline;
 429         if (len > sizeof(driver))
 430             len = sizeof(driver);
 431         pstrcpy(driver, len, cmdline);
 432     } else {
 433         params = "";
 434         pstrcpy(driver, sizeof(driver), cmdline);
 435     }
 436
 437     for (info = device_info_list; info != NULL; info = info->next) {
 438         if (info->bus_info != &usb_bus_info)
 439             continue;
 440         usb = DO_UPCAST(USBDeviceInfo, qdev, info);
 441         if (usb->usbdevice_name == NULL)
 442             continue;
 443         if (strcmp(usb->usbdevice_name, driver) != 0)
 444             continue;
 445         break;
 446     }
 447     if (info == NULL) {
 448 #if 0
 449         /* no error because some drivers are not converted (yet) */
 450         error_report("usbdevice %s not found", driver);
 451 #endif
 452         return NULL;
 453     }
 454
 455     if (!usb->usbdevice_init) {
 456         if (*params) {
 457             error_report("usbdevice %s accepts no params", driver);
 458             return NULL;
 459         }
 460         return usb_create_simple(bus, usb->qdev.name);
 461     }
 462     return usb->usbdevice_init(params);
 463 }