Archipelago » qemu

#include "hw.h"

#include "usb.h"

#include "qdev.h"

#include "sysemu.h"

#include "monitor.h"

static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);

static struct BusInfo usb_bus_info = {

    .name      = "USB",

    .size      = sizeof(USBBus),

    .print_dev = usb_bus_dev_print,

};

static int next_usb_bus = 0;

static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);

void usb_bus_new(USBBus *bus, DeviceState *host)

{

    qbus_create_inplace(&bus->qbus, &usb_bus_info, host, NULL);

    bus->busnr = next_usb_bus++;

    bus->qbus.allow_hotplug = 1; /* Yes, we can */

    QTAILQ_INIT(&bus->free);

    QTAILQ_INIT(&bus->used);

    QTAILQ_INSERT_TAIL(&busses, bus, next);

}

USBBus *usb_bus_find(int busnr)

{

    USBBus *bus;

    if (-1 == busnr)

        return QTAILQ_FIRST(&busses);

    QTAILQ_FOREACH(bus, &busses, next) {

        if (bus->busnr == busnr)

            return bus;

    }

    return NULL;

}

static int usb_qdev_init(DeviceState *qdev, DeviceInfo *base)

{

    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);

    USBDeviceInfo *info = DO_UPCAST(USBDeviceInfo, qdev, base);

    int rc;

    pstrcpy(dev->devname, sizeof(dev->devname), qdev->info->name);

    dev->info = info;

    dev->auto_attach = 1;

    rc = dev->info->init(dev);

    if (rc == 0 && dev->auto_attach)

        usb_device_attach(dev);

    return rc;

}

static int usb_qdev_exit(DeviceState *qdev)

{

    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);

    usb_device_detach(dev);

    if (dev->info->handle_destroy) {

        dev->info->handle_destroy(dev);

    }

    return 0;

}

void usb_qdev_register(USBDeviceInfo *info)

{

    info->qdev.bus_info = &usb_bus_info;

    info->qdev.init     = usb_qdev_init;

    info->qdev.unplug   = qdev_simple_unplug_cb;

    info->qdev.exit     = usb_qdev_exit;

    qdev_register(&info->qdev);

}

void usb_qdev_register_many(USBDeviceInfo *info)

{

    while (info->qdev.name) {

        usb_qdev_register(info);

        info++;

    }

}

USBDevice *usb_create(USBBus *bus, const char *name)

{

    DeviceState *dev;

#if 1

    /* temporary stopgap until all usb is properly qdev-ified */

    if (!bus) {

        bus = usb_bus_find(-1);

        if (!bus)

            return NULL;

        fprintf(stderr, "%s: no bus specified, using \"%s\" for \"%s\"\n",

                __FUNCTION__, bus->qbus.name, name);

    }

#endif

    dev = qdev_create(&bus->qbus, name);

    return DO_UPCAST(USBDevice, qdev, dev);

}

USBDevice *usb_create_simple(USBBus *bus, const char *name)

{

    USBDevice *dev = usb_create(bus, name);

    qdev_init_nofail(&dev->qdev);

    return dev;

}

void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,

                       usb_attachfn attach)

{

    port->opaque = opaque;

    port->index = index;

    port->attach = attach;

    QTAILQ_INSERT_TAIL(&bus->free, port, next);

    bus->nfree++;

}

void usb_unregister_port(USBBus *bus, USBPort *port)

{

    if (port->dev)

        qdev_free(&port->dev->qdev);

    QTAILQ_REMOVE(&bus->free, port, next);

    bus->nfree--;

}

static void do_attach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port;

    if (dev->attached) {

        fprintf(stderr, "Warning: tried to attach usb device %s twice\n",

                dev->devname);

        return;

    }

    dev->attached++;

    port = QTAILQ_FIRST(&bus->free);

    QTAILQ_REMOVE(&bus->free, port, next);

    bus->nfree--;

    usb_attach(port, dev);

    QTAILQ_INSERT_TAIL(&bus->used, port, next);

    bus->nused++;

}

int usb_device_attach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBDevice *hub;

    if (bus->nfree == 1) {

        /* Create a new hub and chain it on.  */

        hub = usb_create_simple(bus, "QEMU USB Hub");

    }

    do_attach(dev);

    return 0;

}

int usb_device_detach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port;

    if (!dev->attached) {

        fprintf(stderr, "Warning: tried to detach unattached usb device %s\n",

                dev->devname);

        return -1;

    }

    dev->attached--;

    QTAILQ_FOREACH(port, &bus->used, next) {

        if (port->dev == dev)

            break;

    }

    assert(port != NULL);

    QTAILQ_REMOVE(&bus->used, port, next);

    bus->nused--;

    usb_attach(port, NULL);

    QTAILQ_INSERT_TAIL(&bus->free, port, next);

    bus->nfree++;

    return 0;

}

int usb_device_delete_addr(int busnr, int addr)

{

    USBBus *bus;

    USBPort *port;

    USBDevice *dev;

    bus = usb_bus_find(busnr);

    if (!bus)

        return -1;

    QTAILQ_FOREACH(port, &bus->used, next) {

        if (port->dev->addr == addr)

            break;

    }

    if (!port)

        return -1;

    dev = port->dev;

    qdev_free(&dev->qdev);

    return 0;

}

static const char *usb_speed(unsigned int speed)

{

    static const char *txt[] = {

        [ USB_SPEED_LOW  ] = "1.5",

        [ USB_SPEED_FULL ] = "12",

        [ USB_SPEED_HIGH ] = "480",

    };

    if (speed >= ARRAY_SIZE(txt))

        return "?";

    return txt[speed];

}

static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)

{

    USBDevice *dev = DO_UPCAST(USBDevice, qdev, qdev);

    USBBus *bus = usb_bus_from_device(dev);

    monitor_printf(mon, "%*saddr %d.%d, speed %s, name %s\n", indent, "",

                   bus->busnr, dev->addr,

                   usb_speed(dev->speed), dev->devname);

}

void usb_info(Monitor *mon)

{

    USBBus *bus;

    USBDevice *dev;

    USBPort *port;

    if (QTAILQ_EMPTY(&busses)) {

        monitor_printf(mon, "USB support not enabled\n");

        return;

    }

    QTAILQ_FOREACH(bus, &busses, next) {

        QTAILQ_FOREACH(port, &bus->used, next) {

            dev = port->dev;

            if (!dev)

                continue;

            monitor_printf(mon, "  Device %d.%d, Speed %s Mb/s, Product %s\n",

                           bus->busnr, dev->addr, usb_speed(dev->speed), dev->devname);

        }

    }

}

/* handle legacy -usbdevice cmd line option */

USBDevice *usbdevice_create(const char *cmdline)

{

    USBBus *bus = usb_bus_find(-1 /* any */);

    DeviceInfo *info;

    USBDeviceInfo *usb;

    char driver[32], *params;

    int len;

    params = strchr(cmdline,':');

    if (params) {

        params++;

        len = params - cmdline;

        if (len > sizeof(driver))

            len = sizeof(driver);

        pstrcpy(driver, len, cmdline);

    } else {

        pstrcpy(driver, sizeof(driver), cmdline);

    }

    for (info = device_info_list; info != NULL; info = info->next) {

        if (info->bus_info != &usb_bus_info)

            continue;

        usb = DO_UPCAST(USBDeviceInfo, qdev, info);

        if (usb->usbdevice_name == NULL)

            continue;

        if (strcmp(usb->usbdevice_name, driver) != 0)

            continue;

        break;

    }

    if (info == NULL) {

#if 0

        /* no error because some drivers are not converted (yet) */

        qemu_error("usbdevice %s not found\n", driver);

#endif

        return NULL;

    }

    if (!usb->usbdevice_init) {

        if (params) {

            qemu_error("usbdevice %s accepts no params\n", driver);

            return NULL;

        }

        return usb_create_simple(bus, usb->qdev.name);

    }

    return usb->usbdevice_init(params);

}