k9s1208.c

mp4的源码,主要包括loader,usb driver,mp3 decoder,jpeg decoder,mpeg decoder部分.引导部分是基于arm9的s3c2410,部分代码未经过完善.

#include <string.h>
#include "def.h"
#include "option.h"
#include "2410addr.h"


#define NF_CMD(cmd)		{rNFCMD=cmd;}
#define NF_ADDR(addr)	{rNFADDR=addr;}	
#define NF_nFCE_L()		{rNFCONF&=~(1<<11);}
#define NF_nFCE_H()		{rNFCONF|=(1<<11);}
#define NF_RSTECC()		{rNFCONF|=(1<<12);}
#define NF_RDDATA() 	(rNFDATA)
#define NF_WRDATA(data) {rNFDATA=data;}
#define NF_WAITRB()  	{while(!(rNFSTAT&(1<<0)));} 	    //wait tWB and check F_RNB pin.   


#define ID_K9S1208V0M	0xec76

// HCLK=100Mhz
#define TACLS		0  //1clk(10ns) 
#define TWRPH0		3  //4clk(40ns)
#define TWRPH1		0  //1clk(10ns)  //TACLS+TWRPH0+TWRPH1>=50ns

// 1block=(512+16)bytes x 32pages
// 4096block
// A[23:14][13:9]
// block   page

void __RdPage512(U8 *bufPt); 

int NF_ReadPage(U32 block,U32 page,U8 *buffer)
{
    int i;
    register U8 * bufPt=buffer;
    unsigned int blockPage;
    U8 ecc0,ecc1,ecc2;
    U8 se[16];	   
    
    blockPage=(block<<5)+page;
    NF_RSTECC();    // Initialize ECC
    NF_nFCE_L();    
    NF_CMD(0x00);   // Read command
    NF_ADDR(0);	    // Column = 0
    NF_ADDR(blockPage&0xff);	    //
    NF_ADDR((blockPage>>8)&0xff);   // Block & Page num.
    NF_ADDR((blockPage>>16)&0xff);  // Block & Page num.
    for(i=0;i<5;i++); 	//wait tWB(100ns)
    NF_WAITRB();		// Wait tR(max 12us)

    __RdPage512(bufPt);
    ecc0=rNFECC0;
    ecc1=rNFECC1;
    ecc2=rNFECC2;
    se[0]=NF_RDDATA();
    se[1]=NF_RDDATA();
    se[2]=NF_RDDATA();
    NF_RDDATA();
    NF_RDDATA();
    se[5]=NF_RDDATA();
    NF_nFCE_H();    
    if(ecc0==se[0] && ecc1==se[1] && ecc2==se[2] && se[5]==0xff)
    {
	//Uart_Printf("[ECC OK:%x,%x,%x]\n",se[0],se[1],se[2]);
    	return 1;
    }
    else
    {
	//Uart_Printf("[ECC ERROR(RD):read:%x,%x,%x, reg:%x,%x,%x]\n",se[0],se[1],se[2],ecc0,ecc1,ecc2);
		return 1;
    }    	
}


int NF_IsBadBlock(U32 block)
{
    int i;
    unsigned int blockPage;
    U8 data;
    
    blockPage=(block<<5);	// For 2'nd cycle I/O[7:5] 
    NF_nFCE_L();    
    NF_CMD(0x50);			// Spare array read command
    NF_ADDR(517&0xf);		// Read the mark of bad block in spare array(M addr=5) 
    NF_ADDR(blockPage&0xff);		// The mark of bad block is in 0 page
    NF_ADDR((blockPage>>8)&0xff);   // For block number A[24:17]
    NF_ADDR((blockPage>>16)&0xff);  // For block number A[25]
	for(i=0;i<10;i++);	// wait tWB(100ns) 
    NF_WAITRB();		// Wait tR(max 12us)
    data=NF_RDDATA();
	NF_nFCE_H();    
    if(data!=0xff)
    {
    	//Uart_Printf("[block %d has been marked as a bad block(%x)]\n",block,data);
    	return 1;
    }
    else
    {
    	return 0;
    }
}



void NF_Reset(void)
{
    int i;
   
    NF_nFCE_L();
    NF_CMD(0xFF);	//reset command
    for(i=0;i<10;i++);  //tWB = 100ns. 
    NF_WAITRB();      //wait 200~500us;
    NF_nFCE_H();
}



void NF_Init(void)
{
    rNFCONF=(1<<15)|(1<<14)|(1<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0);	
    // 1  1    1     1,   1      xxx,  r xxx,   r xxx        
    // En 512B 4step ECCR nFCE=H tACLS   tWRPH0   tWRPH1
    NF_Reset();
}