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