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 char *usb_get_dev_path(DeviceState *dev);

static char *usb_get_fw_dev_path(DeviceState *qdev);

static struct BusInfo usb_bus_info = {

    .name      = "USB",

    .size      = sizeof(USBBus),

    .print_dev = usb_bus_dev_print,

    .get_dev_path = usb_get_dev_path,

    .get_fw_dev_path = usb_get_fw_dev_path,

    .props      = (Property[]) {

        DEFINE_PROP_STRING("port", USBDevice, port_path),

        DEFINE_PROP_END_OF_LIST()

    },

};

static int next_usb_bus = 0;

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

const VMStateDescription vmstate_usb_device = {

    .name = "USBDevice",

    .version_id = 1,

    .minimum_version_id = 1,

    .fields = (VMStateField []) {

        VMSTATE_UINT8(addr, USBDevice),

        VMSTATE_INT32(state, USBDevice),

        VMSTATE_INT32(remote_wakeup, USBDevice),

        VMSTATE_INT32(setup_state, USBDevice),

        VMSTATE_INT32(setup_len, USBDevice),

        VMSTATE_INT32(setup_index, USBDevice),

        VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),

        VMSTATE_END_OF_LIST(),

    }

};

void usb_bus_new(USBBus *bus, USBBusOps *ops, DeviceState *host)

{

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

    bus->ops = ops;

    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->product_desc, sizeof(dev->product_desc), info->product_desc);

    dev->info = info;

    dev->auto_attach = 1;

    QLIST_INIT(&dev->strings);

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

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

        rc = usb_device_attach(dev);

    return rc;

}

static int usb_qdev_exit(DeviceState *qdev)

{

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

    if (dev->attached) {

        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;

        error_report("%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);

    if (!dev) {

        hw_error("Failed to create USB device '%s'\n", name);

    }

    qdev_init_nofail(&dev->qdev);

    return dev;

}

static void usb_fill_port(USBPort *port, void *opaque, int index,

                          USBPortOps *ops, int speedmask)

{

    port->opaque = opaque;

    port->index = index;

    port->opaque = opaque;

    port->index = index;

    port->ops = ops;

    port->speedmask = speedmask;

    usb_port_location(port, NULL, index + 1);

}

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

                       USBPortOps *ops, int speedmask)

{

    usb_fill_port(port, opaque, index, ops, speedmask);

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

    bus->nfree++;

}

int usb_register_companion(const char *masterbus, USBPort *ports[],

                           uint32_t portcount, uint32_t firstport,

                           void *opaque, USBPortOps *ops, int speedmask)

{

    USBBus *bus;

    int i;

    QTAILQ_FOREACH(bus, &busses, next) {

        if (strcmp(bus->qbus.name, masterbus) == 0) {

            break;

        }

    }

    if (!bus || !bus->ops->register_companion) {

        qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",

                      "an USB masterbus");

        if (bus) {

            error_printf_unless_qmp(

                "USB bus '%s' does not allow companion controllers\n",

                masterbus);

        }

        return -1;

    }

    for (i = 0; i < portcount; i++) {

        usb_fill_port(ports[i], opaque, i, ops, speedmask);

    }

    return bus->ops->register_companion(bus, ports, portcount, firstport);

}

void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)

{

    if (upstream) {

        snprintf(downstream->path, sizeof(downstream->path), "%s.%d",

                 upstream->path, portnr);

    } else {

        snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);

    }

}

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 int do_attach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port;

    if (dev->attached) {

        error_report("Error: tried to attach usb device %s twice\n",

                dev->product_desc);

        return -1;

    }

    if (bus->nfree == 0) {

        error_report("Error: tried to attach usb device %s to a bus with no free ports\n",

                dev->product_desc);

        return -1;

    }

    if (dev->port_path) {

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

            if (strcmp(port->path, dev->port_path) == 0) {

                break;

            }

        }

        if (port == NULL) {

            error_report("Error: usb port %s (bus %s) not found\n",

                    dev->port_path, bus->qbus.name);

            return -1;

        }

    } else {

        port = QTAILQ_FIRST(&bus->free);

    }

    if (!(port->speedmask & dev->speedmask)) {

        error_report("Warning: speed mismatch trying to attach usb device %s to bus %s\n",

                dev->product_desc, bus->qbus.name);

        return -1;

    }

    dev->attached++;

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

    bus->nfree--;

    usb_attach(port, dev);

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

    bus->nused++;

    return 0;

}

int usb_device_attach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    if (bus->nfree == 1 && dev->port_path == NULL) {

        /* Create a new hub and chain it on

           (unless a physical port location is specified). */

        usb_create_simple(bus, "usb-hub");

    }

    return do_attach(dev);

}

int usb_device_detach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port;

    if (!dev->attached) {

        error_report("Error: tried to detach unattached usb device %s\n",

                dev->product_desc);

        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",

        [ USB_SPEED_SUPER ] = "5000",

    };

    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, port %s, speed %s, name %s%s\n",

                   indent, "", bus->busnr, dev->addr,

                   dev->port ? dev->port->path : "-",

                   usb_speed(dev->speed), dev->product_desc,

                   dev->attached ? ", attached" : "");

}

static char *usb_get_dev_path(DeviceState *qdev)

{

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

    return qemu_strdup(dev->port->path);

}

static char *usb_get_fw_dev_path(DeviceState *qdev)

{

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

    char *fw_path, *in;

    ssize_t pos = 0, fw_len;

    long nr;

    fw_len = 32 + strlen(dev->port->path) * 6;

    fw_path = qemu_malloc(fw_len);

    in = dev->port->path;

    while (fw_len - pos > 0) {

        nr = strtol(in, &in, 10);

        if (in[0] == '.') {

            /* some hub between root port and device */

            pos += snprintf(fw_path + pos, fw_len - pos, "hub@%ld/", nr);

            in++;

        } else {

            /* the device itself */

            pos += snprintf(fw_path + pos, fw_len - pos, "%s@%ld",

                            qdev_fw_name(qdev), nr);

            break;

        }

    }

    return fw_path;

}

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, Port %s, Speed %s Mb/s, Product %s\n",

                           bus->busnr, dev->addr, port->path, usb_speed(dev->speed),

                           dev->product_desc);

        }

    }

}

/* 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];

    const char *params;

    int len;

    params = strchr(cmdline,':');

    if (params) {

        params++;

        len = params - cmdline;

        if (len > sizeof(driver))

            len = sizeof(driver);

        pstrcpy(driver, len, cmdline);

    } else {

        params = "";

        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) */

        error_report("usbdevice %s not found", driver);

#endif

        return NULL;

    }

    if (!usb->usbdevice_init) {

        if (*params) {

            error_report("usbdevice %s accepts no params", driver);

            return NULL;

        }

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

    }

    return usb->usbdevice_init(params);

}