ffuart.h

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/* SPDX-License-Identifier: GPL-2.0+-with-RTEMS-exception */
 
/*
 * Copyright (c) 2009 Yang Xi <hiyangxi@gmail.com>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */
 
#ifndef __FFUART_H__
#define __FFUART_H__
 
typedef struct {
  /*
   *Receive buffer(DLAB=0).Transmit buffer(DLAB=0).
   *Divisor Latch Low(DLAB=1)
   */
  volatile unsigned int rbr;
  /*Interrupt enable(DLAB=0). Divisor Latch High(DLAB=1)*/
  volatile unsigned int ier;
  /*Interrupt identification.FIFO control*/
  volatile unsigned int iir;
  /*Line Control*/
  volatile unsigned int lcr;
  /*Modem control*/
  volatile unsigned int mcr;
  /*Line Status*/
  volatile unsigned int lsr;
  /*Modem status*/
  volatile unsigned int msr;
  /*Scratch Pad*/
  volatile unsigned int spr;
  /*Infrared Selection*/
  volatile unsigned int isr;
} ffuart_reg_t;
 
 
#define EIGHT_BITS_NOPARITY_1STOPBIT  0x3
#define DLAB 0x80
 
 
/*Divisor = frequency_uart/(16 * BaudRate*)*/
#define FREQUENCY_UART (14745600)
 
#define SEND_EMPTY 0x20
#define FULL_RECEIVE 0x01
 
#endif