PREOP_OPTYPE
readl(ispi->sregs + PREOP_OPTYPE));
preop = readw(ispi->sregs + PREOP_OPTYPE);
writel(optype << 16 | preop, ispi->sregs + PREOP_OPTYPE);
preop = readw(ispi->sregs + PREOP_OPTYPE);
preop = readw(ispi->sregs + PREOP_OPTYPE);
writel(opcode, ispi->sregs + PREOP_OPTYPE);