TFIE
writel((bank << BANK_SHIFT) | RD_STATUS_REG | TFIE,
writel((bank << BANK_SHIFT) | WE | TFIE, dev->io_base + SMI_CR2);
writel((bank << BANK_SHIFT) | SEND | TFIE | (bytes << TX_LEN_SHIFT),
(3 << RX_LEN_SHIFT) | TFIE;