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, USBPortOps *ops)
 117 {
 118     port->opaque = opaque;
 119     port->index = index;
 120     port->pdev = pdev;
 121     port->opaque = opaque;
 122     port->index = index;
 123     port->ops = ops;
 124     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 125     bus->nfree++;
 126 }
 127
 128 void usb_unregister_port(USBBus *bus, USBPort *port)
 129 {
 130     if (port->dev)
 131         qdev_free(&port->dev->qdev);
 132     QTAILQ_REMOVE(&bus->free, port, next);
 133     bus->nfree--;
 134 }
 135
 136 static void do_attach(USBDevice *dev)
 137 {
 138     USBBus *bus = usb_bus_from_device(dev);
 139     USBPort *port;
 140
 141     if (dev->attached) {
 142         fprintf(stderr, "Warning: tried to attach usb device %s twice\n",
 143                 dev->product_desc);
 144         return;
 145     }
 146     dev->attached++;
 147
 148     port = QTAILQ_FIRST(&bus->free);
 149     QTAILQ_REMOVE(&bus->free, port, next);
 150     bus->nfree--;
 151
 152     usb_attach(port, dev);
 153
 154     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 155     bus->nused++;
 156 }
 157
 158 int usb_device_attach(USBDevice *dev)
 159 {
 160     USBBus *bus = usb_bus_from_device(dev);
 161
 162     if (bus->nfree == 1) {
 163         /* Create a new hub and chain it on.  */
 164         usb_create_simple(bus, "usb-hub");
 165     }
 166     do_attach(dev);
 167     return 0;
 168 }
 169
 170 int usb_device_detach(USBDevice *dev)
 171 {
 172     USBBus *bus = usb_bus_from_device(dev);
 173     USBPort *port;
 174
 175     if (!dev->attached) {
 176         fprintf(stderr, "Warning: tried to detach unattached usb device %s\n",
 177                 dev->product_desc);
 178         return -1;
 179     }
 180     dev->attached--;
 181
 182     QTAILQ_FOREACH(port, &bus->used, next) {
 183         if (port->dev == dev)
 184             break;
 185     }
 186     assert(port != NULL);
 187
 188     QTAILQ_REMOVE(&bus->used, port, next);
 189     bus->nused--;
 190
 191     usb_attach(port, NULL);
 192
 193     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 194     bus->nfree++;
 195     return 0;
 196 }
 197
 198 int usb_device_delete_addr(int busnr, int addr)
 199 {
 200     USBBus *bus;
 201     USBPort *port;
 202     USBDevice *dev;
 203
 204     bus = usb_bus_find(busnr);
 205     if (!bus)
 206         return -1;
 207
 208     QTAILQ_FOREACH(port, &bus->used, next) {
 209         if (port->dev->addr == addr)
 210             break;
 211     }
 212     if (!port)
 213         return -1;
 214     dev = port->dev;
 215
 216     qdev_free(&dev->qdev);
 217     return 0;
 218 }
 219
 220 static const char *usb_speed(unsigned int speed)
 221 {
 222     static const char *txt[] = {
 223         [ USB_SPEED_LOW  ] = "1.5",
 224         [ USB_SPEED_FULL ] = "12",
 225         [ USB_SPEED_HIGH ] = "480",
 226     };
 227     if (speed >= ARRAY_SIZE(txt))
 228         return "?";
 229     return txt[speed];
 230 }
 231
 232 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 233 {
 234     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
 235     USBBus *bus = usb_bus_from_device(dev);
 236
 237     monitor_printf(mon, "%*saddr %d.%d, speed %s, name %s%s\n",
 238                    indent, "", bus->busnr, dev->addr,
 239                    usb_speed(dev->speed), dev->product_desc,
 240                    dev->attached ? ", attached" : "");
 241 }
 242
 243 void usb_info(Monitor *mon)
 244 {
 245     USBBus *bus;
 246     USBDevice *dev;
 247     USBPort *port;
 248
 249     if (QTAILQ_EMPTY(&busses)) {
 250         monitor_printf(mon, "USB support not enabled\n");
 251         return;
 252     }
 253
 254     QTAILQ_FOREACH(bus, &busses, next) {
 255         QTAILQ_FOREACH(port, &bus->used, next) {
 256             dev = port->dev;
 257             if (!dev)
 258                 continue;
 259             monitor_printf(mon, "  Device %d.%d, Speed %s Mb/s, Product %s\n",
 260                            bus->busnr, dev->addr, usb_speed(dev->speed),
 261                            dev->product_desc);
 262         }
 263     }
 264 }
 265
 266 /* handle legacy -usbdevice cmd line option */
 267 USBDevice *usbdevice_create(const char *cmdline)
 268 {
 269     USBBus *bus = usb_bus_find(-1 /* any */);
 270     DeviceInfo *info;
 271     USBDeviceInfo *usb;
 272     char driver[32];
 273     const char *params;
 274     int len;
 275
 276     params = strchr(cmdline,':');
 277     if (params) {
 278         params++;
 279         len = params - cmdline;
 280         if (len > sizeof(driver))
 281             len = sizeof(driver);
 282         pstrcpy(driver, len, cmdline);
 283     } else {
 284         params = "";
 285         pstrcpy(driver, sizeof(driver), cmdline);
 286     }
 287
 288     for (info = device_info_list; info != NULL; info = info->next) {
 289         if (info->bus_info != &usb_bus_info)
 290             continue;
 291         usb = DO_UPCAST(USBDeviceInfo, qdev, info);
 292         if (usb->usbdevice_name == NULL)
 293             continue;
 294         if (strcmp(usb->usbdevice_name, driver) != 0)
 295             continue;
 296         break;
 297     }
 298     if (info == NULL) {
 299 #if 0
 300         /* no error because some drivers are not converted (yet) */
 301         error_report("usbdevice %s not found", driver);
 302 #endif
 303         return NULL;
 304     }
 305
 306     if (!usb->usbdevice_init) {
 307         if (*params) {
 308             error_report("usbdevice %s accepts no params", driver);
 309             return NULL;
 310         }
 311         return usb_create_simple(bus, usb->qdev.name);
 312     }
 313     return usb->usbdevice_init(params);
 314 }
 315
 316 static int usbbus_get_fw_dev_path_helper(USBDevice *d, USBBus *bus, char *p,
 317                                          int len)
 318 {
 319     int l = 0;
 320     USBPort *port;
 321
 322     QTAILQ_FOREACH(port, &bus->used, next) {
 323         if (port->dev == d) {
 324             if (port->pdev) {
 325                 l = usbbus_get_fw_dev_path_helper(port->pdev, bus, p, len);
 326             }
 327             l += snprintf(p + l, len - l, "%s@%x/", qdev_fw_name(&d->qdev),
 328                           port->index);
 329             break;
 330         }
 331     }
 332
 333     return l;
 334 }
 335
 336 static char *usbbus_get_fw_dev_path(DeviceState *dev)
 337 {
 338     USBDevice *d = (USBDevice*)dev;
 339     USBBus *bus = usb_bus_from_device(d);
 340     char path[100];
 341     int l;
 342
 343     assert(d->attached != 0);
 344
 345     l = usbbus_get_fw_dev_path_helper(d, bus, path, sizeof(path));
 346
 347     if (l == 0) {
 348         abort();
 349     }
 350
 351     path[l-1] = '\0';
 352
 353     return strdup(path);
 354 }