uart.h

/*
 * (C) Copyright 2007-2012
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Tom Cubie <tangliang@allwinnertech.com>
 *
 * Early uart print for debugging.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef _UART_H
#define _UART_H

#include "cpu.h"

#define UART0_RBR (SUNXI_UART0_BASE + 0x0)    /* receive buffer register */
#define UART0_THR (SUNXI_UART0_BASE + 0x0)    /* transmit holding register */
#define UART0_DLL (SUNXI_UART0_BASE + 0x0)    /* divisor latch low register */

#define UART0_DLH (SUNXI_UART0_BASE + 0x4)    /* divisor latch high register */
#define UART0_IER (SUNXI_UART0_BASE + 0x4)    /* interrupt enable reigster */

#define UART0_IIR (SUNXI_UART0_BASE + 0x8)    /* interrupt identity register */
#define UART0_FCR (SUNXI_UART0_BASE + 0x8)    /* fifo control register */

#define UART0_LCR (SUNXI_UART0_BASE + 0xc)    /* line control register */

#define UART0_LSR (SUNXI_UART0_BASE + 0x14)   /* line status register */

#define BAUD_115200    (0xD) /* 24 * 1000 * 1000 / 16 / 115200 = 13 */
#define NO_PARITY      (0)
#define ONE_STOP_BIT   (0)
#define DAT_LEN_8_BITS (3)
#define LC_8_N_1       (NO_PARITY << 3 | ONE_STOP_BIT << 2 | DAT_LEN_8_BITS)

void uart0_init(void);
void uart0_putc(char c);
void uart0_puts(const char *s);

#endif