zyd_usb_ioread_req
zyd_res zyd_usb_ioread_req(struct zyd_usb *uc, const void *in_data,
result = zyd_usb_ioread_req(&sc->usb, ®buf, sizeof (regbuf),
result = zyd_usb_ioread_req(&sc->usb, regs, sizeof (regs),