static int ehci_state_fetchentry(EHCIState *ehci, int async)
{
    int again = 0;
    uint32_t entry = ehci_get_fetch_addr(ehci, async);

    if (NLPTR_TBIT(entry)) {
        ehci_set_state(ehci, async, EST_ACTIVE);
        goto out;
    }

    /* section 4.8, only QH in async schedule */
    if (async && (NLPTR_TYPE_GET(entry) != NLPTR_TYPE_QH)) {
        fprintf(stderr, "non queue head request in async schedule\n");
        return -1;
    }

    switch (NLPTR_TYPE_GET(entry)) {
    case NLPTR_TYPE_QH:
        ehci_set_state(ehci, async, EST_FETCHQH);
        again = 1;
        break;

    case NLPTR_TYPE_ITD:
        ehci_set_state(ehci, async, EST_FETCHITD);
        again = 1;
        break;

    case NLPTR_TYPE_STITD:
        ehci_set_state(ehci, async, EST_FETCHSITD);
        again = 1;
        break;

    default:
        /* TODO: handle FSTN type */
        fprintf(stderr, "FETCHENTRY: entry at %X is of type %d "
                "which is not supported yet\n", entry, NLPTR_TYPE_GET(entry));
        return -1;
    }

out:
    return again;
}
Unknown