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root / hw / usb-bus.c @ 290a5c60

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#include "hw.h"
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#include "usb.h"
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#include "qdev.h"
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#include "sysemu.h"
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#include "monitor.h"
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static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
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static char *usb_get_dev_path(DeviceState *dev);
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static char *usb_get_fw_dev_path(DeviceState *qdev);
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static struct BusInfo usb_bus_info = {
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    .name      = "USB",
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    .size      = sizeof(USBBus),
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    .print_dev = usb_bus_dev_print,
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    .get_dev_path = usb_get_dev_path,
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    .get_fw_dev_path = usb_get_fw_dev_path,
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    .props      = (Property[]) {
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        DEFINE_PROP_STRING("port", USBDevice, port_path),
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        DEFINE_PROP_END_OF_LIST()
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    },
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};
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static int next_usb_bus = 0;
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static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
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const VMStateDescription vmstate_usb_device = {
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    .name = "USBDevice",
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    .version_id = 1,
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    .minimum_version_id = 1,
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    .fields = (VMStateField []) {
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        VMSTATE_UINT8(addr, USBDevice),
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        VMSTATE_INT32(state, USBDevice),
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        VMSTATE_INT32(remote_wakeup, USBDevice),
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        VMSTATE_INT32(setup_state, USBDevice),
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        VMSTATE_INT32(setup_len, USBDevice),
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        VMSTATE_INT32(setup_index, USBDevice),
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        VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
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        VMSTATE_END_OF_LIST(),
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    }
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};
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void usb_bus_new(USBBus *bus, USBBusOps *ops, DeviceState *host)
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{
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    qbus_create_inplace(&bus->qbus, &usb_bus_info, host, NULL);
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    bus->ops = ops;
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    bus->busnr = next_usb_bus++;
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    bus->qbus.allow_hotplug = 1; /* Yes, we can */
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    QTAILQ_INIT(&bus->free);
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    QTAILQ_INIT(&bus->used);
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    QTAILQ_INSERT_TAIL(&busses, bus, next);
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}
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USBBus *usb_bus_find(int busnr)
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{
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    USBBus *bus;
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    if (-1 == busnr)
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        return QTAILQ_FIRST(&busses);
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    QTAILQ_FOREACH(bus, &busses, next) {
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        if (bus->busnr == busnr)
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            return bus;
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    }
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    return NULL;
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}
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static int usb_qdev_init(DeviceState *qdev, DeviceInfo *base)
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{
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    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
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    USBDeviceInfo *info = DO_UPCAST(USBDeviceInfo, qdev, base);
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    int rc;
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    pstrcpy(dev->product_desc, sizeof(dev->product_desc), info->product_desc);
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    dev->info = info;
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    dev->auto_attach = 1;
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    QLIST_INIT(&dev->strings);
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    rc = dev->info->init(dev);
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    if (rc == 0 && dev->auto_attach)
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        usb_device_attach(dev);
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    return rc;
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}
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static int usb_qdev_exit(DeviceState *qdev)
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{
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    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
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    USBBus *bus = usb_bus_from_device(dev);
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    if (dev->attached) {
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        usb_device_detach(dev);
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    }
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    bus->ops->device_destroy(bus, dev);
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    if (dev->info->handle_destroy) {
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        dev->info->handle_destroy(dev);
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    }
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    return 0;
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}
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void usb_qdev_register(USBDeviceInfo *info)
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{
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    info->qdev.bus_info = &usb_bus_info;
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    info->qdev.init     = usb_qdev_init;
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    info->qdev.unplug   = qdev_simple_unplug_cb;
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    info->qdev.exit     = usb_qdev_exit;
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    qdev_register(&info->qdev);
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}
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void usb_qdev_register_many(USBDeviceInfo *info)
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{
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    while (info->qdev.name) {
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        usb_qdev_register(info);
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        info++;
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    }
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}
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USBDevice *usb_create(USBBus *bus, const char *name)
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{
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    DeviceState *dev;
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#if 1
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    /* temporary stopgap until all usb is properly qdev-ified */
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    if (!bus) {
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        bus = usb_bus_find(-1);
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        if (!bus)
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            return NULL;
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        fprintf(stderr, "%s: no bus specified, using \"%s\" for \"%s\"\n",
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                __FUNCTION__, bus->qbus.name, name);
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    }
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#endif
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    dev = qdev_create(&bus->qbus, name);
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    return DO_UPCAST(USBDevice, qdev, dev);
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}
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USBDevice *usb_create_simple(USBBus *bus, const char *name)
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{
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    USBDevice *dev = usb_create(bus, name);
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    if (!dev) {
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        hw_error("Failed to create USB device '%s'\n", name);
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    }
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    qdev_init_nofail(&dev->qdev);
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    return dev;
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}
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void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
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                       USBPortOps *ops, int speedmask)
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{
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    port->opaque = opaque;
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    port->index = index;
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    port->opaque = opaque;
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    port->index = index;
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    port->ops = ops;
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    port->speedmask = speedmask;
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    QTAILQ_INSERT_TAIL(&bus->free, port, next);
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    bus->nfree++;
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}
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void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
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{
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    if (upstream) {
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        snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
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                 upstream->path, portnr);
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    } else {
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        snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
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    }
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}
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void usb_unregister_port(USBBus *bus, USBPort *port)
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{
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    if (port->dev)
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        qdev_free(&port->dev->qdev);
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    QTAILQ_REMOVE(&bus->free, port, next);
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    bus->nfree--;
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}
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static void do_attach(USBDevice *dev)
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{
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    USBBus *bus = usb_bus_from_device(dev);
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    USBPort *port;
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    if (dev->attached) {
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        fprintf(stderr, "Warning: tried to attach usb device %s twice\n",
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                dev->product_desc);
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        return;
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    }
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    if (dev->port_path) {
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        QTAILQ_FOREACH(port, &bus->free, next) {
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            if (strcmp(port->path, dev->port_path) == 0) {
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                break;
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            }
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        }
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        if (port == NULL) {
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            fprintf(stderr, "Warning: usb port %s (bus %s) not found\n",
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                    dev->port_path, bus->qbus.name);
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            return;
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        }
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    } else {
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        port = QTAILQ_FIRST(&bus->free);
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    }
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    dev->attached++;
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    QTAILQ_REMOVE(&bus->free, port, next);
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    bus->nfree--;
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    usb_attach(port, dev);
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    QTAILQ_INSERT_TAIL(&bus->used, port, next);
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    bus->nused++;
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}
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int usb_device_attach(USBDevice *dev)
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{
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    USBBus *bus = usb_bus_from_device(dev);
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    if (bus->nfree == 1 && dev->port_path == NULL) {
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        /* Create a new hub and chain it on
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           (unless a physical port location is specified). */
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        usb_create_simple(bus, "usb-hub");
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    }
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    do_attach(dev);
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    return 0;
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}
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int usb_device_detach(USBDevice *dev)
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{
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    USBBus *bus = usb_bus_from_device(dev);
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    USBPort *port;
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    if (!dev->attached) {
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        fprintf(stderr, "Warning: tried to detach unattached usb device %s\n",
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                dev->product_desc);
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        return -1;
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    }
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    dev->attached--;
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    QTAILQ_FOREACH(port, &bus->used, next) {
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        if (port->dev == dev)
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            break;
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    }
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    assert(port != NULL);
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    QTAILQ_REMOVE(&bus->used, port, next);
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    bus->nused--;
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    usb_attach(port, NULL);
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    QTAILQ_INSERT_TAIL(&bus->free, port, next);
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    bus->nfree++;
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    return 0;
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}
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int usb_device_delete_addr(int busnr, int addr)
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{
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    USBBus *bus;
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    USBPort *port;
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    USBDevice *dev;
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    bus = usb_bus_find(busnr);
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    if (!bus)
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        return -1;
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    QTAILQ_FOREACH(port, &bus->used, next) {
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        if (port->dev->addr == addr)
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            break;
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    }
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    if (!port)
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        return -1;
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    dev = port->dev;
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    qdev_free(&dev->qdev);
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    return 0;
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}
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static const char *usb_speed(unsigned int speed)
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{
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    static const char *txt[] = {
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        [ USB_SPEED_LOW  ] = "1.5",
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        [ USB_SPEED_FULL ] = "12",
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        [ USB_SPEED_HIGH ] = "480",
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        [ USB_SPEED_SUPER ] = "5000",
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    };
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    if (speed >= ARRAY_SIZE(txt))
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        return "?";
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    return txt[speed];
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}
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static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
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{
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    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
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    USBBus *bus = usb_bus_from_device(dev);
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    monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
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                   indent, "", bus->busnr, dev->addr,
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                   dev->port ? dev->port->path : "-",
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                   usb_speed(dev->speed), dev->product_desc,
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                   dev->attached ? ", attached" : "");
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}
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static char *usb_get_dev_path(DeviceState *qdev)
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{
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    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
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    return qemu_strdup(dev->port->path);
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}
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static char *usb_get_fw_dev_path(DeviceState *qdev)
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{
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    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);
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    char *fw_path, *in;
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    ssize_t pos = 0, fw_len;
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    long nr;
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    fw_len = 32 + strlen(dev->port->path) * 6;
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    fw_path = qemu_malloc(fw_len);
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    in = dev->port->path;
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    while (fw_len - pos > 0) {
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        nr = strtol(in, &in, 10);
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        if (in[0] == '.') {
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            /* some hub between root port and device */
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            pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);
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            in++;
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        } else {
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            /* the device itself */
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            pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",
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                            qdev_fw_name(qdev), nr);
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            break;
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        }
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    }
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    return fw_path;
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}
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void usb_info(Monitor *mon)
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{
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    USBBus *bus;
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    USBDevice *dev;
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    USBPort *port;
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    if (QTAILQ_EMPTY(&busses)) {
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        monitor_printf(mon, "USB support not enabled\n");
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        return;
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    }
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    QTAILQ_FOREACH(bus, &busses, next) {
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        QTAILQ_FOREACH(port, &bus->used, next) {
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            dev = port->dev;
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            if (!dev)
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                continue;
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            monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
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                           bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
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                           dev->product_desc);
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        }
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    }
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}
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/* handle legacy -usbdevice cmd line option */
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USBDevice *usbdevice_create(const char *cmdline)
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{
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    USBBus *bus = usb_bus_find(-1 /* any */);
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    DeviceInfo *info;
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    USBDeviceInfo *usb;
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    char driver[32];
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    const char *params;
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    int len;
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    params = strchr(cmdline,':');
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    if (params) {
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        params++;
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        len = params - cmdline;
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        if (len > sizeof(driver))
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            len = sizeof(driver);
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        pstrcpy(driver, len, cmdline);
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    } else {
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        params = "";
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        pstrcpy(driver, sizeof(driver), cmdline);
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    }
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    for (info = device_info_list; info != NULL; info = info->next) {
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        if (info->bus_info != &usb_bus_info)
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            continue;
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        usb = DO_UPCAST(USBDeviceInfo, qdev, info);
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        if (usb->usbdevice_name == NULL)
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            continue;
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        if (strcmp(usb->usbdevice_name, driver) != 0)
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            continue;
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        break;
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    }
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    if (info == NULL) {
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#if 0
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        /* no error because some drivers are not converted (yet) */
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        error_report("usbdevice %s not found", driver);
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#endif
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        return NULL;
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    }
391

    
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    if (!usb->usbdevice_init) {
393
        if (*params) {
394
            error_report("usbdevice %s accepts no params", driver);
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            return NULL;
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        }
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        return usb_create_simple(bus, usb->qdev.name);
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    }
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    return usb->usbdevice_init(params);
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}