rt-thread/bsp/ls1cdev/drivers/uart.h

/*
 * File      : uart.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006-2012, RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date               Author             Notes
 * 2011-08-08     lgnq            first version for LS1B
 * 2015-07-06     chinesebear  modified for loongson 1c
 */

#ifndef __UART_H__
#define __UART_H__

#include "ls1c.h"

#define DEV_CLK 252000000 // 252MHz
#define UART_BAUDRATE 115200 

#define UART0_BASE			0xBFE40000
//#define UART0_1_BASE		0xBFE41000
#define UART1_BASE			0xBFE44000
#define UART2_BASE			0xBFE48000
#define UART3_BASE			0xBFE4C000
#define UART4_BASE			0xBFE4C400
#define UART5_BASE			0xBFE4C500
#define UART6_BASE			0xBFE4C600
#define UART7_BASE			0xBFE4C700
#define UART8_BASE			0xBFE4C800
#define UART9_BASE			0xBFE4C900
#define UART10_BASE			0xBFE4Ca00
#define UART11_BASE			0xBFE4Cb00

/* UART registers */
#define UART_DAT(base)		__REG8(base + 0x00)
#define UART_IER(base)		__REG8(base + 0x01)
#define UART_IIR(base)		__REG8(base + 0x02)
#define UART_FCR(base)		__REG8(base + 0x02)
#define UART_LCR(base)		__REG8(base + 0x03)
#define UART_MCR(base)		__REG8(base + 0x04)
#define UART_LSR(base)		__REG8(base + 0x05)
#define UART_MSR(base)		__REG8(base + 0x06)

#define UART_LSB(base)		__REG8(base + 0x00)
#define UART_MSB(base)		__REG8(base + 0x01)

/* UART0 registers */
#define UART0_DAT			__REG8(UART0_BASE + 0x00)
#define UART0_IER			__REG8(UART0_BASE + 0x01)
#define UART0_IIR			__REG8(UART0_BASE + 0x02)
#define UART0_FCR			__REG8(UART0_BASE + 0x02)
#define UART0_LCR			__REG8(UART0_BASE + 0x03)
#define UART0_MCR			__REG8(UART0_BASE + 0x04)
#define UART0_LSR			__REG8(UART0_BASE + 0x05)
#define UART0_MSR			__REG8(UART0_BASE + 0x06)

#define UART0_LSB			__REG8(UART0_BASE + 0x00)
#define UART0_MSB			__REG8(UART0_BASE + 0x01)

/* UART1 registers */
#define UART1_DAT			__REG8(UART1_BASE + 0x00)
#define UART1_IER			__REG8(UART1_BASE + 0x01)
#define UART1_IIR			__REG8(UART1_BASE + 0x02)
#define UART1_FCR			__REG8(UART1_BASE + 0x02)
#define UART1_LCR			__REG8(UART1_BASE + 0x03)
#define UART1_MCR			__REG8(UART1_BASE + 0x04)
#define UART1_LSR			__REG8(UART1_BASE + 0x05)
#define UART1_MSR			__REG8(UART1_BASE + 0x06)

#define UART1_LSB			__REG8(UART1_BASE + 0x00)
#define UART1_MSB			__REG8(UART1_BASE + 0x01)

/* UART interrupt enable register value */
#define UARTIER_IME		(1 << 3)
#define UARTIER_ILE		(1 << 2) 
#define UARTIER_ITXE	(1 << 1)
#define UARTIER_IRXE	(1 << 0)

/* UART line control register value */
#define UARTLCR_DLAB	(1 << 7)
#define UARTLCR_BCB		(1 << 6)
#define UARTLCR_SPB		(1 << 5)
#define UARTLCR_EPS		(1 << 4)
#define UARTLCR_PE		(1 << 3)
#define UARTLCR_SB		(1 << 2)

/* UART line status register value */
#define UARTLSR_ERROR	(1 << 7)
#define UARTLSR_TE		(1 << 6)
#define UARTLSR_TFE		(1 << 5)
#define UARTLSR_BI		(1 << 4)
#define UARTLSR_FE		(1 << 3)
#define UARTLSR_PE		(1 << 2)
#define UARTLSR_OE		(1 << 1)
#define UARTLSR_DR		(1 << 0)

void rt_hw_uart_init(void);

#endif