uhci_toggle
uhci_toggle(td_token(uhci, qh->post_td)) ^ 1;
qh->initial_toggle = uhci_toggle(td_token(uhci, td)) ^
qh->initial_toggle = uhci_toggle(td_token(uhci, td));
if (toggle > 1 || uhci_toggle(td_token(uhci, td)) == toggle) {
toggle = uhci_toggle(td_token(uhci, td)) ^ 1;