Archipelago » qemu

#include "hw.h"

#include "usb.h"

#include "qdev.h"

#include "sysemu.h"

#include "monitor.h"

#include "trace.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 int usb_qdev_exit(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_device_init(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->init) {

        return klass->init(dev);

    }

    return 0;

}

USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->find_device) {

        return klass->find_device(dev, addr);

    }

    return NULL;

}

static void usb_device_handle_destroy(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->handle_destroy) {

        klass->handle_destroy(dev);

    }

}

void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->cancel_packet) {

        klass->cancel_packet(dev, p);

    }

}

void usb_device_handle_attach(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->handle_attach) {

        klass->handle_attach(dev);

    }

}

void usb_device_handle_reset(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->handle_reset) {

        klass->handle_reset(dev);

    }

}

int usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,

                              int value, int index, int length, uint8_t *data)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->handle_control) {

        return klass->handle_control(dev, p, request, value, index, length,

                                         data);

    }

    return -ENOSYS;

}

int usb_device_handle_data(USBDevice *dev, USBPacket *p)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->handle_data) {

        return klass->handle_data(dev, p);

    }

    return -ENOSYS;

}

const char *usb_device_get_product_desc(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    return klass->product_desc;

}

const USBDesc *usb_device_get_usb_desc(USBDevice *dev)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    return klass->usb_desc;

}

void usb_device_set_interface(USBDevice *dev, int interface,

                              int alt_old, int alt_new)

{

    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);

    if (klass->set_interface) {

        klass->set_interface(dev, interface, alt_old, alt_new);

    }

}

static int usb_qdev_init(DeviceState *qdev)

{

    USBDevice *dev = USB_DEVICE(qdev);

    int rc;

    pstrcpy(dev->product_desc, sizeof(dev->product_desc),

            usb_device_get_product_desc(dev));

    dev->auto_attach = 1;

    QLIST_INIT(&dev->strings);

    usb_ep_init(dev);

    rc = usb_claim_port(dev);

    if (rc != 0) {

        return rc;

    }

    rc = usb_device_init(dev);

    if (rc != 0) {

        usb_release_port(dev);

        return rc;

    }

    if (dev->auto_attach) {

        rc = usb_device_attach(dev);

        if (rc != 0) {

            usb_qdev_exit(qdev);

            return rc;

        }

    }

    return 0;

}

static int usb_qdev_exit(DeviceState *qdev)

{

    USBDevice *dev = USB_DEVICE(qdev);

    if (dev->attached) {

        usb_device_detach(dev);

    }

    usb_device_handle_destroy(dev);

    if (dev->port) {

        usb_release_port(dev);

    }

    return 0;

}

typedef struct LegacyUSBFactory

{

    const char *name;

    const char *usbdevice_name;

    USBDevice *(*usbdevice_init)(const char *params);

} LegacyUSBFactory;

static GSList *legacy_usb_factory;

void usb_legacy_register(const char *typename, const char *usbdevice_name,

                         USBDevice *(*usbdevice_init)(const char *params))

{

    if (usbdevice_name) {

        LegacyUSBFactory *f = g_malloc0(sizeof(*f));

        f->name = typename;

        f->usbdevice_name = usbdevice_name;

        f->usbdevice_init = usbdevice_init;

        legacy_usb_factory = g_slist_append(legacy_usb_factory, f);

    }

}

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\"",

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

    }

#endif

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

    return USB_DEVICE(dev);

}

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

{

    USBDevice *dev = usb_create(bus, name);

    int rc;

    if (!dev) {

        error_report("Failed to create USB device '%s'", name);

        return NULL;

    }

    rc = qdev_init(&dev->qdev);

    if (rc < 0) {

        error_report("Failed to initialize USB device '%s'", name);

        return NULL;

    }

    return dev;

}

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

                          USBPortOps *ops, int speedmask)

{

    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--;

}

int usb_claim_port(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port;

    assert(dev->port == NULL);

    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 (in use?)",

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

            return -1;

        }

    } else {

        if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {

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

            usb_create_simple(bus, "usb-hub");

        }

        if (bus->nfree == 0) {

            error_report("Error: tried to attach usb device %s to a bus "

                         "with no free ports", dev->product_desc);

            return -1;

        }

        port = QTAILQ_FIRST(&bus->free);

    }

    trace_usb_port_claim(bus->busnr, port->path);

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

    bus->nfree--;

    dev->port = port;

    port->dev = dev;

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

    bus->nused++;

    return 0;

}

void usb_release_port(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port = dev->port;

    assert(port != NULL);

    trace_usb_port_release(bus->busnr, port->path);

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

    bus->nused--;

    dev->port = NULL;

    port->dev = NULL;

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

    bus->nfree++;

}

int usb_device_attach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port = dev->port;

    assert(port != NULL);

    assert(!dev->attached);

    trace_usb_port_attach(bus->busnr, port->path);

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

        error_report("Warning: speed mismatch trying to attach "

                     "usb device %s to bus %s",

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

        return -1;

    }

    dev->attached++;

    usb_attach(port);

    return 0;

}

int usb_device_detach(USBDevice *dev)

{

    USBBus *bus = usb_bus_from_device(dev);

    USBPort *port = dev->port;

    assert(port != NULL);

    assert(dev->attached);

    trace_usb_port_detach(bus->busnr, port->path);

    usb_detach(port);

    dev->attached--;

    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 = USB_DEVICE(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 = USB_DEVICE(qdev);

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

}

static char *usb_get_fw_dev_path(DeviceState *qdev)

{

    USBDevice *dev = USB_DEVICE(qdev);

    char *fw_path, *in;

    ssize_t pos = 0, fw_len;

    long nr;

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

    fw_path = g_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 */);

    LegacyUSBFactory *f = NULL;

    GSList *i;

    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 (i = legacy_usb_factory; i; i = i->next) {

        f = i->data;

        if (strcmp(f->usbdevice_name, driver) == 0) {

            break;

        }

    }

    if (i == NULL) {

#if 0

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

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

#endif

        return NULL;

    }

    if (!f->usbdevice_init) {

        if (*params) {

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

            return NULL;

        }

        return usb_create_simple(bus, f->name);

    }

    return f->usbdevice_init(params);

}

static void usb_device_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *k = DEVICE_CLASS(klass);

    k->bus_info = &usb_bus_info;

    k->init     = usb_qdev_init;

    k->unplug   = qdev_simple_unplug_cb;

    k->exit     = usb_qdev_exit;

}

static TypeInfo usb_device_type_info = {

    .name = TYPE_USB_DEVICE,

    .parent = TYPE_DEVICE,

    .instance_size = sizeof(USBDevice),

    .abstract = true,

    .class_size = sizeof(USBDeviceClass),

    .class_init = usb_device_class_init,

};

static void usb_register_types(void)

{

    type_register_static(&usb_device_type_info);

}

type_init(usb_register_types)