uart.h

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/*****************************************
 Copyright (c) 2001-2002 
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the Jasper DVD boot loader */

#ifndef __UART_H__
#define __UART_H__

#include "config.h"

#define CPU_WR_32BIT_REG(base, port, value) do { *(volatile unsigned int *)(base+port)=value; } while(0)
#define CPU_RD_32BIT_REG(base, port)  (*(volatile unsigned int *)(base+port))

#ifdef ENABLE_UART

//------------------------------------------------------
// UART REGISTERs
//	UART1 0050_0500
//	UART2 0050_1300
//------------------------------------------------------
#define	UART1_BASE				0x00500500
#define	UART2_BASE				0x00501300
#define	UART_RBR				0x00
#define	UART_TBR				0x04
#define	UART_IER				0x08
#define	UART_IIR				0x0C
#define	UART_FCR				0x10
#define	UART_LCR				0x14
#define	UART_MCR				0x18
#define	UART_LSR				0x1C
#define	UART_MSR				0x20
#define	UART_SCRATCH			0x24
#define	UART_CLKDIV				0x28
#define	UART_CLKSEL				0x2C

/* Line Control Register */
#define UART_LCR_SBC			0x40	/* Set break control */
#define UART_LCR_SPAR			0x20	/* Stick parity (?) */
#define UART_LCR_EPAR			0x10	/* Even parity select */
#define UART_LCR_PARITY			0x08	/* Parity Enable */
#define UART_LCR_STOP			0x04	/* Stop bits: 0 = 1 stop bit, 1 = 2 stop bits */
#define UART_LCR_WLEN5  		0x00	/* Wordlength: 5 bits */
#define UART_LCR_WLEN6  		0x01	/* Wordlength: 6 bits */
#define UART_LCR_WLEN7  		0x02	/* Wordlength: 7 bits */
#define UART_LCR_WLEN8  		0x03	/* Wordlength: 8 bits */

#define UART_LCR_N81			0x03	/* None, 8 bit, 1 bit */
#define UART_PARITY_NONE		0x00
#define UART_PARITY_ODD			0x08
#define UART_PARITY_EVEN		0x18

// default configuration
#define DEFAULT_UART_PORT		0
#define DEFAULT_BAUDRATE		38400				// 300, 1200, 2400, 4800, 9600,
													// 19200, 38400, 57600, 115200, 230400
#define DEFAULT_DATABITS		8					// 5 - 8
#define DEFAULT_STOPBITS		1					// 1 - 2
#define DEFAULT_PARITY			UART_PARITY_NONE	// none, even, odd

//
// function prototypes
//

// initialization

void InitUartPort(int port, int baudrate);
void InitUart(void);

// output

#define PrintUart(x...) PrintString(x)

void PrintChar(int ch);
void PrintString (char *t, int maxlen);
void PrintByte(unsigned char b);
void PrintShort (unsigned short s);
void PrintLong (unsigned long h);
int PrintFormat(const char *fmt, ...);

// input

enum { GETSTR_ESCAPE = 0x01, GETSTR_APPEND = 0x02, GETSTR_APPENDDISP = 0x04};

int PeekChar(void);
int GetChar(void);
char *GetString(char *str, int maxlen, int flag);
char *GetCommand(char *str);
char *GetRawString(char *str, int maxlen);

#else /* ENABLE_UART */

#define PrintUart(x...)			while (0)

#define PrintChar(ch) 			while (0)
#define PrintString(t, maxlen)	while (0)
#define PrintByte(b)			while (0)
#define PrintShort(s)			while (0)
#define PrintLong(h)			while (0)
#define PrintFormat(x...)		while (0)

#endif /* ENABLE_UART */

#endif /* __UART_H__ */