UART_EXAR_8XMODE
exar_write_reg(priv, (offset + UART_EXAR_8XMODE), 0x00);
writeb(0x00, p + UART_EXAR_8XMODE);
writeb(0x00, p + UART_EXAR_8XMODE);
exar_write_reg(priv, (offset + UART_EXAR_8XMODE), 0x00);