test_nandflash.c

test code for nandflash on lumit board,it s designed with S3C4510

/*
 *	test_nandflash.c    --    test nandflash id
 *	
 *	Author: 	lumit-admin <[e-mail]>
 *	Date:		2004-8-26
 *	Copyright:	http://www.lumit.org
 */

#include "led.h"
#include <stdio.h>

//#define SYSCFG		(0x03ff0000)
#define UART0_BASE	(SYSCFG + 0xD000)
#define UART1_BASE 	(SYSCFG + 0xE000)

/*
 * Serial settings.......................
 */
	
#define	ULCON	0x00 
#define	UCON	0x04
#define	USTAT	0x08
#define	UTXBUF	0x0C
#define	URXBUF	0x10
#define	UBRDIV	0x14

/*
 * Line control register bits............
 */
 
#define	ULCR8bits		(3)
#define	ULCRS1StopBit	(0)
#define	ULCRNoParity	(0)

/*
 * UART Control Register bits............
 */
 
#define 	UCRRxM	(1)
#define 	UCRRxSI	(1 << 2)
#define 	UCRTxM	(1 << 3)
#define 	UCRLPB	(1 << 7)

/*
 * UART Status Register bits
 */
 
#define USROverrun     	(1 << 0)
#define	USRParity      	(1 << 1)
#define	USRFraming     	(1 << 2)
#define	USRBreak       	(1 << 3)
#define	USRDTR			(1 << 4)
#define	USRRxData      	(1 << 5) 
#define	USRTxHoldEmpty 	(1 << 6)
#define	USRTxEmpty     	(1 << 7)

#define GET_STATUS(p)	(*(volatile unsigned  *)((p) + USTAT))
#define RX_DATA(s)     	((s) & USRRxData)
#define GET_CHAR(p)		(*(volatile unsigned  *)((p) + URXBUF))
#define TX_READY(s)    	((s) & USRTxHoldEmpty)
#define PUT_CHAR(p,c)  	(*(unsigned  *)((p) + UTXBUF) = (unsigned )(c))

void delay()
{
	int i, j;

	for( i=0; i<50; i++ )
		for ( j=0; j<65536; j++ )
			;
}

void loop( void )
{
	LED_1_ON;
	LED_2_ON;
	LED_3_ON;
	LED_4_ON;

	delay();
	
	LED_1_OFF;
	LED_2_OFF;
	LED_3_OFF;
	LED_4_OFF;

	delay();			
	
	LED_1_ON;
	LED_2_ON;
	LED_3_ON;
	LED_4_ON;
}

int putchar_uart0(int ch)
{
    /* Place your implementation of fputc here     */
    /* e.g. write a character to a UART, or to the */
    /* debugger console with SWI WriteC            */   

	while ( TX_READY(GET_STATUS(UART0_BASE))==0);
	    PUT_CHAR(UART0_BASE, ch);
	    
   return ch;
}

struct __FILE { int handle;   /* Add whatever you need here */};
FILE __stdout;

int fputc(int ch, FILE *f)
{
    /* Place your implementation of fputc here     */
    /* e.g. write a character to a UART, or to the */
    /* debugger console with SWI WriteC            */   

   putchar_uart0( ch );
	    
   return ch;
}

int ferror(FILE *f)
{
    /* Your implementation of ferror */
    return EOF;
}


#define rPDATG            (*(volatile unsigned *)0x03FF5008)
//RB  -> GPIO7
//CLE -> GPIO15
//ALE -> GPIO13
//CE  -> GPIO11
#define RB	(0x80)
#define CLE	(0x8000)
#define ALE	(0x2000)	
#define CE	(0x800)
//#define rKM29UXDATA	   (*(volatile unsigned char *)0x07000000)	//E CS bank2 

//16k = 0x4000

//#define rKM29UXDATA	   (*(volatile unsigned char *)0x07fd0000)	//E CS bank0
//#define rKM29UXDATA	   (*(volatile unsigned char *)0x07fd4000)	//E CS bank1
//#define rKM29UXDATA	   (*(volatile unsigned char *)0x07fd8000)	//E CS bank2
#define rKM29UXDATA	   (*(volatile unsigned char *)0x07fd8000)	//E CS bank2

/*KM29U128操作宏定义*/
#define FC_CMD		{rPDATG |= CLE;	rPDATG &= ~(ALE|CE);}
#define FC_ADDR		{rPDATG |= ALE;	rPDATG &= ~(CLE|CE);}
#define FC_DATA        	{rPDATG &= ~(ALE|CLE|CE);}
#define FC_INACTIVE	{rPDATG |= CE;	rPDATG &= ~(ALE|CLE);}       
#define WAITRB		while(!(rPDATG & RB))  //wait tWB and check R/B pin.   

unsigned int Check_Flash_Id(void)
{
	int i;
	unsigned int id;

	FC_CMD;
	rKM29UXDATA = 0x90;

	FC_ADDR;
	rKM29UXDATA = 0;

	FC_DATA;
	for(i=0;i<10;i++);	//wait 100ns
	id = rKM29UXDATA<<8;
	id += rKM29UXDATA;
	
	FC_INACTIVE;
	return id;	
}

void Flash_Reset()		//flash reset
{ 
	int i;
	FC_CMD;
	rKM29UXDATA = 0xff;	//reset command
	for (i=0;i<3000;i++);	//delay 	
}

void read_nand_flash_id( void )
{
	int id = 0;
	Flash_Reset();
	printf( "*** lumit4510 test nand flash id program ***\r\n" );
	id = Check_Flash_Id();
	printf( "Nand Flash K9F2808Q0B chip id = 0x%x \r\n", id ); 
	printf( "*** end ***\r\n" );	
}

//int main (void)
void C_Entry( void )
{
	int count = 0;
	

	int REFEXTCON = *(unsigned int *)(SYSCFG + 0x303C);
	printf( "REFEXTCON = %x \r\n", REFEXTCON );

	*(unsigned int *)0x03FF5000 = 0x0003ff7f;
	read_nand_flash_id();
	while(1);
	
	while ( ++count )
	{
		loop();
		putchar_uart0( 'l' );
		putchar_uart0( 'u' );
		putchar_uart0( 'm' );
		putchar_uart0( 'i' );
		putchar_uart0( 't' );					
		
	}
}

/****************************************************************
 * End of Pascal.c
 ****************************************************************/