tdvfb_cvg_read
fbiinit1 = ((tdvfb_cvg_read(sc, TDV_OFF_FBIINIT1) &
fbiinit5 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT5)
fbiinit2 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT2);
fbiinit3 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT3);
if (tdvfb_cvg_read(sc, TDV_OFF_STATUS) & TDV_STATUS_FBI_BUSY)
static uint32_t tdvfb_cvg_read(struct tdvfb_softc *sc, uint32_t reg);
v = tdvfb_cvg_read(sc, reg) | bits;
v = tdvfb_cvg_read(sc, reg) & ~bits;
rv = tdvfb_cvg_read(sc, TDV_OFF_DAC_READ);