hw/usb-bus.c

   1 #include "hw.h"
   2 #include "usb.h"
   3 #include "qdev.h"
   4
   5 static struct BusInfo usb_bus_info = {
   6     .name  = "USB",
   7     .size  = sizeof(USBBus),
   8 };
   9 static int next_usb_bus = 0;
  10 static TAILQ_HEAD(, USBBus) busses = TAILQ_HEAD_INITIALIZER(busses);
  11
  12 USBBus *usb_bus_new(DeviceState *host)
  13 {
  14     USBBus *bus;
  15
  16     bus = FROM_QBUS(USBBus, qbus_create(&usb_bus_info, host, NULL));
  17     bus->busnr = next_usb_bus++;
  18     TAILQ_INIT(&bus->free);
  19     TAILQ_INIT(&bus->used);
  20     TAILQ_INSERT_TAIL(&busses, bus, next);
  21     return bus;
  22 }
  23
  24 USBBus *usb_bus_find(int busnr)
  25 {
  26     USBBus *bus;
  27
  28     if (-1 == busnr)
  29         return TAILQ_FIRST(&busses);
  30     TAILQ_FOREACH(bus, &busses, next) {
  31         if (bus->busnr == busnr)
  32             return bus;
  33     }
  34     return NULL;
  35 }
  36
  37 static int usb_qdev_init(DeviceState *qdev, DeviceInfo *base)
  38 {
  39     USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
  40     USBDeviceInfo *info = DO_UPCAST(USBDeviceInfo, qdev, base);
  41     int rc;
  42
  43     pstrcpy(dev->devname, sizeof(dev->devname), qdev->info->name);
  44     dev->info = info;
  45     rc = dev->info->init(dev);
  46     return rc;
  47 }
  48
  49 void usb_qdev_register(USBDeviceInfo *info)
  50 {
  51     info->qdev.bus_info = &usb_bus_info;
  52     info->qdev.init     = usb_qdev_init;
  53     qdev_register(&info->qdev);
  54 }
  55
  56 void usb_qdev_register_many(USBDeviceInfo *info)
  57 {
  58     while (info->qdev.name) {
  59         usb_qdev_register(info);
  60         info++;
  61     }
  62 }
  63
  64 USBDevice *usb_create_simple(USBBus *bus, const char *name)
  65 {
  66     DeviceState *dev;
  67
  68 #if 1
  69     /* temporary stopgap until all usb is properly qdev-ified */
  70     if (!bus) {
  71         bus = usb_bus_find(-1);
  72         if (!bus)
  73             return NULL;
  74         fprintf(stderr, "%s: no bus specified, using \"%s\" for \"%s\"\n",
  75                 __FUNCTION__, bus->qbus.name, name);
  76     }
  77 #endif
  78
  79     dev = qdev_create(&bus->qbus, name);
  80     qdev_init(dev);
  81     return DO_UPCAST(USBDevice, qdev, dev);
  82 }