CSR2
write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
write_i2c_reg_nowait(pd->regs, CSR2, pd->csr2);
REGA( CSR2 ) = 0;
REGA(CSR2) = dvma_vtob(&(MEM->init)) >> 16;
iowrite32(0x01, tp->base_addr + CSR2);
iowrite32(0, ioaddr + CSR2); /* Rx poll demand */
xw32(CSR2, 0);
ret = ravb_endisable_csum_gbeth(ndev, CSR2, val, CSR0_RPE);
ravb_write(ndev, CSR2_CSUM_ENABLE, CSR2);