source: mainline/uspace/drv/vhc/devconn.c@ 6cb58e6

#include <errno.h>
#include "vhcd.h"
#include "hub/virthub.h"


static vhc_virtdev_t *vhc_virtdev_create()
{
        vhc_virtdev_t *dev = malloc(sizeof(vhc_virtdev_t));
        if (dev == NULL) {
                return NULL;
        }
        dev->address = 0;
        dev->dev_phone = -1;
        dev->dev_local = NULL;
        dev->plugged = true;
        link_initialize(&dev->link);
        fibril_mutex_initialize(&dev->guard);
        list_initialize(&dev->transfer_queue);

        return dev;
}

static int vhc_virtdev_plug_generic(vhc_data_t *vhc,
    int phone, usbvirt_device_t *virtdev,
    uintptr_t *handle, bool connect)
{
        vhc_virtdev_t *dev = vhc_virtdev_create();
        if (dev == NULL) {
                return ENOMEM;
        }

        dev->dev_phone = phone;
        dev->dev_local = virtdev;

        fibril_mutex_lock(&vhc->guard);
        list_append(&dev->link, &vhc->devices);
        fibril_mutex_unlock(&vhc->guard);

        fid_t fibril = fibril_create(vhc_transfer_queue_processor, dev);
        if (fibril == 0) {
                free(dev);
                return ENOMEM;
        }
        fibril_add_ready(fibril);

        if (handle != NULL) {
                *handle = (uintptr_t) dev;
        }

        if (connect) {
                // FIXME: check status
                (void) virthub_connect_device(vhc->hub, dev);
        }

        return EOK;
}

int vhc_virtdev_plug(vhc_data_t *vhc, int phone, uintptr_t *handle)
{
        return vhc_virtdev_plug_generic(vhc, phone, NULL, handle, true);
}

int vhc_virtdev_plug_local(vhc_data_t *vhc, usbvirt_device_t *dev, uintptr_t *handle)
{
        return vhc_virtdev_plug_generic(vhc, -1, dev, handle, true);
}

int vhc_virtdev_plug_hub(vhc_data_t *vhc, usbvirt_device_t *dev, uintptr_t *handle)
{
        return vhc_virtdev_plug_generic(vhc, -1, dev, handle, false);
}

void vhc_virtdev_unplug(vhc_data_t *vhc, uintptr_t handle)
{
        vhc_virtdev_t *dev = (vhc_virtdev_t *) handle;

        // FIXME: check status
        (void) virthub_disconnect_device(vhc->hub, dev);

        fibril_mutex_lock(&vhc->guard);
        fibril_mutex_lock(&dev->guard);
        dev->plugged = false;
        list_remove(&dev->link);
        fibril_mutex_unlock(&dev->guard);
        fibril_mutex_unlock(&vhc->guard);
}