flash.c

source code of armboot for s3c4510

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * 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
 */

#include "armboot.h"

#if defined (AM29LV160D) || defined (HY29LV320B)
#define FLASH_BANK_SIZE 0x200000
#define MAIN_SECT_SIZE  0x10000
#define PARAM_SECT_SIZE 0x2000
#define INIT_SECT_SIZE  0x4000  /* for AMD29LV160DB */
#define MIDDLE_SECT_SIZE 0x8000 /* for AMD29LV160DB */
#endif

#ifdef K8B1616UBA
#define FLASH_BANK_SIZE 0x200000
#define MAIN_SECT_SIZE  0x10000
#define PARAM_SECT_SIZE 0x2000
#endif

#if defined(AM29LV320D) || defined(AT49BV321)
#define FLASH_BANK_SIZE 0x400000
#define MAIN_SECT_SIZE  0x10000
#define PARAM_SECT_SIZE 0x2000
#endif

#ifdef SST39VF160
#define FLASH_BANK_SIZE 0x200000
#define MAIN_SECT_SIZE  0x10000
#define PARAM_SECT_SIZE 0x1000
#endif

flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];

/*-----------------------------------------------------------------------
 */

ulong flash_init(bd_t *bd)
{
    int i, j;
    ulong size = 0;
    
    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
    {
#if defined (AM29LV160D) || defined (HY29LV320B)
    	ulong flashbase = 0;
#if defined(MBM29LV160BE)
    	flash_info[i].flash_id = (FUJ_MANUFACT & FLASH_VENDMASK) |(FUJ_ID_MBM29LV160BE & FLASH_TYPEMASK);
#elif defined(M29W160DB)
    	flash_info[i].flash_id = (ST_MANUFACT & FLASH_VENDMASK) |(ST_ID_M29W160DB & FLASH_TYPEMASK);
#elif defined(HY29LV320B)
    	flash_info[i].flash_id = (HYNIX_MANUFACT & FLASH_VENDMASK) |(HYNIX_ID_HY29LV320B & FLASH_TYPEMASK);
#else
    	flash_info[i].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |(AMD_ID_LV160D & FLASH_TYPEMASK);
#endif
    	flash_info[i].size = FLASH_BANK_SIZE;
		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
		
	 	flashbase = PHYS_FLASH_1;


		for (j = 0; j < flash_info[i].sector_count; j++)
        {
			if(j <= 1)
				flash_info[i].start[j] = flashbase + j * INIT_SECT_SIZE;
			else if ((2 <= j)&&(j <= 3))
				flash_info[i].start[j] = flashbase + (j+1) * PARAM_SECT_SIZE;
			else
				flash_info[i].start[j] = flashbase + (j-3)*MAIN_SECT_SIZE;
		}

		size += flash_info[i].size;
#else 
    	ulong flashbase = 0;

#if defined(K8B1616UBA)
    	flash_info[i].flash_id = (SAMSUNG_MANUFACT & FLASH_VENDMASK) |(SAMSUNG_ID_K8B1616UBA & FLASH_TYPEMASK);
#elif defined(AM29LV320D)
    	flash_info[i].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |(AMD_ID_LV320DB & FLASH_TYPEMASK);
#elif defined(AT49BV321)
    	flash_info[i].flash_id = (ATMEL_MANUFACT & FLASH_VENDMASK) |(ATMEL_ID_AT49BV321 & FLASH_TYPEMASK);
#elif defined(SST39VF160)
    	flash_info[i].flash_id = (SST_MANUFACT & FLASH_VENDMASK) |(SST_ID_xF160A & FLASH_TYPEMASK);
#endif
		
		flash_info[i].size = FLASH_BANK_SIZE;
		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
		
	 	flashbase = PHYS_FLASH_1;

	 	for (j = 0; j < flash_info[i].sector_count; j++)
		{
#ifdef SST39VF160
	    	if (j <= 15)
#else
			if (j <= 7)
#endif
	    	{
				flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
				
			}
	    	else
	    	{
#ifdef SST39VF160
				flash_info[i].start[j] = flashbase + (j - 15)*MAIN_SECT_SIZE;
#else
				flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
#endif

	   	 	}
		}
		size += flash_info[i].size;
#endif

	}
           
    /* Protect monitor and environment sectors
     */
    flash_protect(FLAG_PROTECT_SET,
		  CFG_FLASH_BASE,
		  CFG_FLASH_BASE +_armboot_end - _armboot_start,
		  &flash_info[0]);
    
    flash_protect(FLAG_PROTECT_SET,
		  CFG_ENV_ADDR,
		  CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
		  &flash_info[0]);
    
    return size;
}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
    int i;

    switch (info->flash_id & FLASH_VENDMASK)
    {
    	case (SAMSUNG_MANUFACT & FLASH_VENDMASK):
		printf("SAMSUNG : ");
		break;
    	case (AMD_MANUFACT & FLASH_VENDMASK):
		printf("AMD : ");
		break;
    	case (ATMEL_MANUFACT & FLASH_VENDMASK):
		printf("ATMEL : ");
		break;
    	case (FUJ_MANUFACT & FLASH_VENDMASK):
		printf("FUJITSU : ");
		break;
    	case (SST_MANUFACT & FLASH_VENDMASK):
		printf("SST : ");
		break;
    	case (HYNIX_MANUFACT & FLASH_VENDMASK):
		printf("HYNIX : ");
		break;
    	default:
		printf("Unknown Vendor ");
		break;
    }
    
    switch (info->flash_id & FLASH_TYPEMASK)
    {
    	case (SAMSUNG_ID_K8B1616UBA & FLASH_TYPEMASK):
		printf("K8B1616UBA\n");
		break;
    	case (AMD_ID_LV320DB & FLASH_TYPEMASK):
		printf("AM29LV320D\n");
		break;
    	case (ATMEL_ID_AT49BV321 & FLASH_TYPEMASK):
		printf("AT49BV321\n");
		break;
#if defined(MBM29LV160BE)
    	case (FUJ_ID_MBM29LV160BE & FLASH_TYPEMASK):
		printf("MBM29LV160BE\n");
		break;
#elif defined(M29W160DB)
    	case (ST_ID_M29W160DB & FLASH_TYPEMASK):
		printf("M29W160DB\n");
		break;
#else    	
		case (AMD_ID_LV160D & FLASH_TYPEMASK):
		printf("AM29LV160D\n");
		break;
#endif
    	case (SST_ID_xF160A & FLASH_TYPEMASK):
		printf("SST39VF160\n");
		break;
    	case (HYNIX_ID_HY29LV320B & FLASH_TYPEMASK):
		printf("HY29LV320B\n");
		break;
    	default:
		printf("Unknown Chip Type\n");
		goto Done;
		break;
    }
    
    printf("  Size: %ld MB in %d Sectors\n",info->size >> 20, info->sector_count);
    
    printf("  Sector Start Addresses:");
    for (i = 0; i < info->sector_count; i++)
    {
		if ((i % 5) == 0)
		{
	    	printf ("\n   ");
		}
		printf (" %08lX%s", info->start[i],
			info->protect[i] ? " (RO)" : "     ");
    }
    printf ("\n");
    
Done:
}

void Delay1Sec(unsigned int nSec)
{
	unsigned int i; 

	while(nSec--)
	{
		printf("\n");
		i=200000; 
		while(i--) ;
	}		
}
void Delay1(unsigned int nSec)
{
	unsigned int i; 

	while(nSec--)
	{
		i=20; 
		while(i--) ;
	}		
}

void FlashDelay(unsigned int  nusecs)
{
	unsigned long j, k, i=0x1234;

	while(nusecs--)
	{
		for (j=0; j<30; j++)
			k = j * i;
	}
}
/*-----------------------------------------------------------------------
 */

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
    int flag, prot, sect;
    int rc = ERR_OK;
       
    if (info->flash_id == FLASH_UNKNOWN)
    	return ERR_UNKNOWN_FLASH_TYPE;

    if ((s_first < 0) || (s_first > s_last))
    	return ERR_INVAL;
    

    //if ((info->flash_id & FLASH_VENDMASK) !=(SAMSUNG_MANUFACT & FLASH_VENDMASK))
    //	return ERR_UNKNOWN_FLASH_VENDOR;    

    prot = 0;
    
    for (sect=s_first; sect<=s_last; ++sect)
    {
		if (info->protect[sect])
			prot++;		
    }

    if (prot)
    {
    	return ERR_PROTECTED;
    }

    /* 
     * Disable interrupts which might cause a timeout
     * here. Remember that our exception vectors are
     * at address 0 in the flash, and we don't want a
     * (ticker) exception to happen while the flash
     * chip is in programming mode.
     */
    flag = disable_interrupts();

    /* Start erase on unprotected sectors */
    for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
    {
    	unsigned short	*Flash;
		unsigned long	temp;
		unsigned long	temp_E;
		unsigned long	SectorAddr;

		Flash = (unsigned short *)(CFG_FLASH_BASE);
		
    	printf("Erasing sector %2d ... ", sect);
    	/* arm simple, non interrupt dependent timer */
		/*reset_timer_masked();*/

    	Delay1(5);
    	SectorAddr = flash_info[0].start[sect];	/* total address */
    
#ifdef SST39VF160
		if(sect < 16)
		{
			*(Flash+0x5555) = 0xAA;
    		Delay1(1);
    		*(Flash+0x2AAA) = 0x55;
    		Delay1(1);
			*(Flash+0x5555) = 0x80;
			Delay1(1);
			*(Flash+0x5555) = 0xAA;
			Delay1(1);
			*(Flash+0x2AAA) = 0x55;
			Delay1(1);
		
			*((volatile unsigned short *)(SectorAddr)) = 0x30;
		}
		else
		{
			*(Flash+0x5555) = 0xAA;
    		Delay1(1);
    		*(Flash+0x2AAA) = 0x55;
    		Delay1(1);
			*(Flash+0x5555) = 0x80;
			Delay1(1);
			*(Flash+0x5555) = 0xAA;
			Delay1(1);
			*(Flash+0x2AAA) = 0x55;
			Delay1(1);
		
			*((volatile unsigned short *)(SectorAddr)) = 0x50;

		}
#else
		
		*(Flash+0x555) = 0xAA;
    	Delay1(1);
    	*(Flash+0x2AA) = 0x55;
    	Delay1(1);
		*(Flash+0x555) = 0x80;
		Delay1(1);
		*(Flash+0x555) = 0xAA;
		Delay1(1);
		*(Flash+0x2AA) = 0x55;
		Delay1(1);
		
		*((volatile unsigned short *)(SectorAddr)) = 0x30;
#endif

		temp_E = SectorAddr;
		Delay1Sec(1);
		temp = (*((volatile unsigned short *)(temp_E)) & 0x00FF);
		while( temp != 0x00FF )
		{
			temp = (*((volatile unsigned short *)(temp_E)) & 0x00FF);
		}

		*((volatile unsigned short *)(CFG_FLASH_BASE)) = 0xF0;
    
	}
    if (ctrlc())
      printf("User Interrupt!\n");
    
    #if 0

outahere:
   
    /* allow flash to settle - wait 10 ms */
    udelay_masked(10000);

   
    if (flag)
      enable_interrupts();
   #endif   
    return rc;
}


/*-----------------------------------------------------------------------
 * Copy memory to flash
 */


static int write_word (flash_info_t *info, ulong dest, ushort data)
{
    /*vulong *addr = (vulong *)dest;*/
    unsigned short *addr;
    u16 barf;
    int rc = ERR_OK;
    int flag;
    
	unsigned short	*Flash;

	addr = (unsigned short *)(dest) ;

    flag = disable_interrupts();

    Flash = (unsigned short *)CFG_FLASH_BASE;

#ifdef SST39VF160
	*(Flash+0x5555) = 0xAA;
	Delay1(1);
	*(Flash+0x2AAA) = 0x55;
	Delay1(1);
	*(Flash+0x5555) = 0xA0;
	Delay1(1);
#else
	*(Flash+0x555) = 0xAA;
	Delay1(1);
	*(Flash+0x2AA) = 0x55;
	Delay1(1);
	*(Flash+0x555) = 0xA0;
	Delay1(1);
#endif
	*addr = (unsigned short)data;
	
	FlashDelay(10);

	*((unsigned short *)(CFG_FLASH_BASE)) = 0xF0;
    
   
    /* arm simple, non interrupt dependent timer */
    reset_timer_masked();
  
    /* wait while polling the status register */

    #if 0
	if (get_timer_masked() > CFG_FLASH_WRITE_TOUT)
	{
	   	rc = ERR_TIMOUT;
	   	Log(DEBUG,"ZZZ");
	   	return rc;
	}
	#endif
	
	if(FlashCompareData((unsigned int)dest, dest, 1))
	{
		barf = *addr;
		printf("\nFlash write error %lx at address %lx\n",(u32)barf, dest);
		rc = ERR_PROG_ERROR;
		return rc;
	}

    return rc;
    
}


/*-----------------------------------------------------------------------
 * Copy memory to flash.
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
    ulong cp, wp;
    int l;
    int i, rc;
    ushort data=0;
    
    wp = (addr & ~3);	/* get lower word aligned address */
       
    /*
     * handle unaligned start bytes
     */
    if ((l = addr - wp) != 0)
    {
    	data = 0;
		for (i=0, cp=wp; i<l; ++i, ++cp)
		    data = (data >> 8) | (*(uchar *)cp << 24);
		
		for (; i<4 && cnt>0; ++i)
		{
	    	data = (data >> 8) | (*src++ << 24);
	    	--cnt;
	    	++cp;
		}
		
		for (; cnt==0 && i<4; ++i, ++cp)
	    	data = (data >> 8) | (*(uchar *)cp << 24);
		
	
		if ((rc = write_word(info, wp, data)) != 0)
	    	return (rc);
	
		wp += 4;
    }
    
    /*
     * handle word aligned part
     */

    while (cnt >= 2)
    {
    	data = *((unsigned short *)src);
    	if ((rc = write_word(info, addr, data)) != 0)
			return (rc);

		src += 2;
		addr  += 2;
		cnt -= 2;

	}
    
    if (cnt == 0)
		return ERR_OK;
    
    
    /*
     * handle unaligned tail bytes
     */
    data = 0;
    for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp)
    {
		data = (data >> 8) | (*src++ << 24);
		--cnt;
    }
    for (; i<4; ++i, ++cp)
		data = (data >> 8) | (*(uchar *)cp << 24);
    
    return write_word(info, wp, data);
}

//--------------------------------------------------------------------------//
//  FlashCompareData: compare Flash to DRAM                                      //
//                                                                          //
//--------------------------------------------------------------------------//
int FlashCompareData( unsigned int BaseAddr, unsigned int SrcAddr, unsigned int SrcSize )
{
	unsigned short	*src, *tgt;
	unsigned int		i;
	unsigned int		size;


	src   = (unsigned short *)SrcAddr;
	tgt   = (unsigned short *)BaseAddr;

	size  = SrcSize/sizeof(unsigned short);

	for ( i=0; i<size; i++, src++, tgt++ ) 
	{
		if ( *tgt != *src ) 
		{
			printf("\n>> Data Compare Error!\n");
			return(ERR_PROG_ERROR);
		}	


	}
	return(ERR_OK);
}