FIFOcfg
writew(0x0000, ioaddr + FIFOcfg);
writew(0x0028, ioaddr + FIFOcfg);
writew(0x004C, ioaddr + FIFOcfg);
writew(0x006C, ioaddr + FIFOcfg);
writew(0x0000, ioaddr + FIFOcfg);
iowrite16(fifo_cfg, ioaddr + FIFOcfg);