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
   7 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
   8
   9 static char *usb_get_dev_path(DeviceState *dev);
  10 static char *usb_get_fw_dev_path(DeviceState *qdev);
  11
  12 static struct BusInfo usb_bus_info = {
  13     .name      = "USB",
  14     .size      = sizeof(USBBus),
  15     .print_dev = usb_bus_dev_print,
  16     .get_dev_path = usb_get_dev_path,
  17     .get_fw_dev_path = usb_get_fw_dev_path,
  18     .props      = (Property[]) {
  19         DEFINE_PROP_STRING("port", USBDevice, port_path),
  20         DEFINE_PROP_END_OF_LIST()
  21     },
  22 };
  23 static int next_usb_bus = 0;
  24 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  25
  26 const VMStateDescription vmstate_usb_device = {
  27     .name = "USBDevice",
  28     .version_id = 1,
  29     .minimum_version_id = 1,
  30     .fields = (VMStateField []) {
  31         VMSTATE_UINT8(addr, USBDevice),
  32         VMSTATE_INT32(state, USBDevice),
  33         VMSTATE_INT32(remote_wakeup, USBDevice),
  34         VMSTATE_INT32(setup_state, USBDevice),
  35         VMSTATE_INT32(setup_len, USBDevice),
  36         VMSTATE_INT32(setup_index, USBDevice),
  37         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  38         VMSTATE_END_OF_LIST(),
  39     }
  40 };
  41
  42 void usb_bus_new(USBBus *bus, DeviceState *host)
  43 {
  44     qbus_create_inplace(&bus->qbus, &usb_bus_info, host, NULL);
  45     bus->busnr = next_usb_bus++;
  46     bus->qbus.allow_hotplug = 1; /* Yes, we can */
  47     QTAILQ_INIT(&bus->free);
  48     QTAILQ_INIT(&bus->used);
  49     QTAILQ_INSERT_TAIL(&busses, bus, next);
  50 }
  51
  52 USBBus *usb_bus_find(int busnr)
  53 {
  54     USBBus *bus;
  55
  56     if (-1 == busnr)
  57         return QTAILQ_FIRST(&busses);
  58     QTAILQ_FOREACH(bus, &busses, next) {
  59         if (bus->busnr == busnr)
  60             return bus;
  61     }
  62     return NULL;
  63 }
  64
  65 static int usb_qdev_init(DeviceState *qdev, DeviceInfo *base)
  66 {
  67     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
  68     USBDeviceInfo *info = DO_UPCAST(USBDeviceInfo, qdev, base);
  69     int rc;
  70
  71     pstrcpy(dev->product_desc, sizeof(dev->product_desc), info->product_desc);
  72     dev->info = info;
  73     dev->auto_attach = 1;
  74     QLIST_INIT(&dev->strings);
  75     rc = dev->info->init(dev);
  76     if (rc == 0 && dev->auto_attach)
  77         usb_device_attach(dev);
  78     return rc;
  79 }
  80
  81 static int usb_qdev_exit(DeviceState *qdev)
  82 {
  83     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
  84
  85     usb_device_detach(dev);
  86     if (dev->info->handle_destroy) {
  87         dev->info->handle_destroy(dev);
  88     }
  89     return 0;
  90 }
  91
  92 void usb_qdev_register(USBDeviceInfo *info)
  93 {
  94     info->qdev.bus_info = &usb_bus_info;
  95     info->qdev.init     = usb_qdev_init;
  96     info->qdev.unplug   = qdev_simple_unplug_cb;
  97     info->qdev.exit     = usb_qdev_exit;
  98     qdev_register(&info->qdev);
  99 }
 100
 101 void usb_qdev_register_many(USBDeviceInfo *info)
 102 {
 103     while (info->qdev.name) {
 104         usb_qdev_register(info);
 105         info++;
 106     }
 107 }
 108
 109 USBDevice *usb_create(USBBus *bus, const char *name)
 110 {
 111     DeviceState *dev;
 112
 113 #if 1
 114     /* temporary stopgap until all usb is properly qdev-ified */
 115     if (!bus) {
 116         bus = usb_bus_find(-1);
 117         if (!bus)
 118             return NULL;
 119         fprintf(stderr, "%s: no bus specified, using \"%s\" for \"%s\"\n",
 120                 __FUNCTION__, bus->qbus.name, name);
 121     }
 122 #endif
 123
 124     dev = qdev_create(&bus->qbus, name);
 125     return DO_UPCAST(USBDevice, qdev, dev);
 126 }
 127
 128 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 129 {
 130     USBDevice *dev = usb_create(bus, name);
 131     if (!dev) {
 132         hw_error("Failed to create USB device '%s'\n", name);
 133     }
 134     qdev_init_nofail(&dev->qdev);
 135     return dev;
 136 }
 137
 138 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 139                        USBPortOps *ops, int speedmask)
 140 {
 141     port->opaque = opaque;
 142     port->index = index;
 143     port->opaque = opaque;
 144     port->index = index;
 145     port->ops = ops;
 146     port->speedmask = speedmask;
 147     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 148     bus->nfree++;
 149 }
 150
 151 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 152 {
 153     if (upstream) {
 154         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 155                  upstream->path, portnr);
 156     } else {
 157         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 158     }
 159 }
 160
 161 void usb_unregister_port(USBBus *bus, USBPort *port)
 162 {
 163     if (port->dev)
 164         qdev_free(&port->dev->qdev);
 165     QTAILQ_REMOVE(&bus->free, port, next);
 166     bus->nfree--;
 167 }
 168
 169 static void do_attach(USBDevice *dev)
 170 {
 171     USBBus *bus = usb_bus_from_device(dev);
 172     USBPort *port;
 173
 174     if (dev->attached) {
 175         fprintf(stderr, "Warning: tried to attach usb device %s twice\n",
 176                 dev->product_desc);
 177         return;
 178     }
 179     if (dev->port_path) {
 180         QTAILQ_FOREACH(port, &bus->free, next) {
 181             if (strcmp(port->path, dev->port_path) == 0) {
 182                 break;
 183             }
 184         }
 185         if (port == NULL) {
 186             fprintf(stderr, "Warning: usb port %s (bus %s) not found\n",
 187                     dev->port_path, bus->qbus.name);
 188             return;
 189         }
 190     } else {
 191         port = QTAILQ_FIRST(&bus->free);
 192     }
 193
 194     dev->attached++;
 195     QTAILQ_REMOVE(&bus->free, port, next);
 196     bus->nfree--;
 197
 198     usb_attach(port, dev);
 199
 200     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 201     bus->nused++;
 202 }
 203
 204 int usb_device_attach(USBDevice *dev)
 205 {
 206     USBBus *bus = usb_bus_from_device(dev);
 207
 208     if (bus->nfree == 1 && dev->port_path == NULL) {
 209         /* Create a new hub and chain it on
 210            (unless a physical port location is specified). */
 211         usb_create_simple(bus, "usb-hub");
 212     }
 213     do_attach(dev);
 214     return 0;
 215 }
 216
 217 int usb_device_detach(USBDevice *dev)
 218 {
 219     USBBus *bus = usb_bus_from_device(dev);
 220     USBPort *port;
 221
 222     if (!dev->attached) {
 223         fprintf(stderr, "Warning: tried to detach unattached usb device %s\n",
 224                 dev->product_desc);
 225         return -1;
 226     }
 227     dev->attached--;
 228
 229     QTAILQ_FOREACH(port, &bus->used, next) {
 230         if (port->dev == dev)
 231             break;
 232     }
 233     assert(port != NULL);
 234
 235     QTAILQ_REMOVE(&bus->used, port, next);
 236     bus->nused--;
 237
 238     usb_attach(port, NULL);
 239
 240     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 241     bus->nfree++;
 242     return 0;
 243 }
 244
 245 int usb_device_delete_addr(int busnr, int addr)
 246 {
 247     USBBus *bus;
 248     USBPort *port;
 249     USBDevice *dev;
 250
 251     bus = usb_bus_find(busnr);
 252     if (!bus)
 253         return -1;
 254
 255     QTAILQ_FOREACH(port, &bus->used, next) {
 256         if (port->dev->addr == addr)
 257             break;
 258     }
 259     if (!port)
 260         return -1;
 261     dev = port->dev;
 262
 263     qdev_free(&dev->qdev);
 264     return 0;
 265 }
 266
 267 static const char *usb_speed(unsigned int speed)
 268 {
 269     static const char *txt[] = {
 270         [ USB_SPEED_LOW  ] = "1.5",
 271         [ USB_SPEED_FULL ] = "12",
 272         [ USB_SPEED_HIGH ] = "480",
 273     };
 274     if (speed >= ARRAY_SIZE(txt))
 275         return "?";
 276     return txt[speed];
 277 }
 278
 279 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 280 {
 281     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 282     USBBus *bus = usb_bus_from_device(dev);
 283
 284     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 285                    indent, "", bus->busnr, dev->addr,
 286                    dev->port ? dev->port->path : "-",
 287                    usb_speed(dev->speed), dev->product_desc,
 288                    dev->attached ? ", attached" : "");
 289 }
 290
 291 static char *usb_get_dev_path(DeviceState *qdev)
 292 {
 293     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 294     return qemu_strdup(dev->port->path);
 295 }
 296
 297 static char *usb_get_fw_dev_path(DeviceState *qdev)
 298 {
 299     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 300     char *fw_path, *in;
 301     ssize_t pos = 0, fw_len;
 302     long nr;
 303
 304     fw_len = 32 + strlen(dev->port->path) * 6;
 305     fw_path = qemu_malloc(fw_len);
 306     in = dev->port->path;
 307     while (fw_len - pos > 0) {
 308         nr = strtol(in, &in, 10);
 309         if (in[0] == '.') {
 310             /* some hub between root port and device */
 311             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);
 312             in++;
 313         } else {
 314             /* the device itself */
 315             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",
 316                             qdev_fw_name(qdev), nr);
 317             break;
 318         }
 319     }
 320     return fw_path;
 321 }
 322
 323 void usb_info(Monitor *mon)
 324 {
 325     USBBus *bus;
 326     USBDevice *dev;
 327     USBPort *port;
 328
 329     if (QTAILQ_EMPTY(&busses)) {
 330         monitor_printf(mon, "USB support not enabled\n");
 331         return;
 332     }
 333
 334     QTAILQ_FOREACH(bus, &busses, next) {
 335         QTAILQ_FOREACH(port, &bus->used, next) {
 336             dev = port->dev;
 337             if (!dev)
 338                 continue;
 339             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 340                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 341                            dev->product_desc);
 342         }
 343     }
 344 }
 345
 346 /* handle legacy -usbdevice cmd line option */
 347 USBDevice *usbdevice_create(const char *cmdline)
 348 {
 349     USBBus *bus = usb_bus_find(-1 /* any */);
 350     DeviceInfo *info;
 351     USBDeviceInfo *usb;
 352     char driver[32];
 353     const char *params;
 354     int len;
 355
 356     params = strchr(cmdline,':');
 357     if (params) {
 358         params++;
 359         len = params - cmdline;
 360         if (len > sizeof(driver))
 361             len = sizeof(driver);
 362         pstrcpy(driver, len, cmdline);
 363     } else {
 364         params = "";
 365         pstrcpy(driver, sizeof(driver), cmdline);
 366     }
 367
 368     for (info = device_info_list; info != NULL; info = info->next) {
 369         if (info->bus_info != &usb_bus_info)
 370             continue;
 371         usb = DO_UPCAST(USBDeviceInfo, qdev, info);
 372         if (usb->usbdevice_name == NULL)
 373             continue;
 374         if (strcmp(usb->usbdevice_name, driver) != 0)
 375             continue;
 376         break;
 377     }
 378     if (info == NULL) {
 379 #if 0
 380         /* no error because some drivers are not converted (yet) */
 381         error_report("usbdevice %s not found", driver);
 382 #endif
 383         return NULL;
 384     }
 385
 386     if (!usb->usbdevice_init) {
 387         if (*params) {
 388             error_report("usbdevice %s accepts no params", driver);
 389             return NULL;
 390         }
 391         return usb_create_simple(bus, usb->qdev.name);
 392     }
 393     return usb->usbdevice_init(params);
 394 }