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